Basic concepts: molecular biology, DNA, RNAs, chemical bonds, importance of water, chemical reactions, organic compounds, carbohydrates, lipids, cholesterol, proteins, amino acids, fats, steroids, emulsifiers, etc.

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Biology 205 (BIOL 205-UCAL) Midterm III

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Question 1

Cytoskeleton is composed of... (ID-B03-62)

A	...Ribosomes, Lysosome and Centriole.
B	...Lysosome and Centriole.
C	...Microtubule, Intermediate filament and Microfilament.
D	...Centriole, Golgi apparatus and Ribosomes.
E	...Plasma membrane, Ribosomes and Lysosome.

Question 2

What is the relative size of a typical eukaryotic cell? (ID-B03-58)

A	1/100th of a typical prokaryotic celll.
B	1/50th of a typical prokaryotic celll.
C	1/10th of a typical prokaryotic celll.
D	1/30th of a typical prokaryotic celll.
E	1/25th of a typical prokaryotic celll.

Question 3

How many different RNAs are discovered by biologists? (ID-B03-41)

A	5
B	4
C	3
D	2

Question 3 Explanation: 

They are mRNA, tRNA and rRNA.

Question 4

Higher the electronegativity, ... (ID-B03-12)

A	...lower the radioactivity of the atom.
B	...higher the radioactivity of the atom.
C	...more stable the atom.
D	...higher the pull of electrons towards its nucleus.
E	...lower the pull of electrons towards its nucleus.

Question 5

Association of multiple polypeptides are often found in what level of protein structure? (ID-B03-37)

A	Secondary structure
B	Tertiary structure
C	Primary structure
D	Quaternary structure

Question 6

What is the major function of phospholipids? (ID-B03-46)

A	Synthesis of Amino acids, DNA and RNA.
B	Energy storage and release.
C	Signaling molecules for sex hormones.
D	Forms cell membranes.

Question 7

What is the difference between temperature and heat? (ID-B03-15)

A	Temperature is a long term quantitative measurement of energy while heat is a short term measurement of energy.
B	Heat is produced through instantaneous reactions such as boiling water. Temperature is the quantitative measurement of heat.
C	Temperature is the amount of energy associated with movement of atoms while heat is the intensity of heat (average speed of atoms).
D	Heat is the amount of energy associated with movement of atoms while temperature is the intensity of heat (average speed of atoms).

Question 8

During cell reproduction, chromatin fibers coil up into __I__ structures and when the cell is not dividing, chromatin fibers are in structures called __II__. (ID-B03-65)

A	I. ribosomes II. lysosomes
B	I. chromosomes II. chromatin
C	I. chromosomes II. ribosomes
D	I. ribosomes II. nucleoli
E	I. lysosomes II. nucleoli

Question 9

Fundamentally, functions of proteins are determine by... (ID-B03-32)

A	...their orientation of the hydrogen atoms.
B	...their chemical structures.
C	...water solubility level.
D	...the type of translation.

Question 10

Polymers are broken down to monomers by what process? (ID-B03-79)

A	ATP injection
B	Protein pumps
C	Heating
D	Hydrolysis

Question 11

What is the most abundant organic compound on Earth? (ID-B03-31)

A	Lipids
B	Cellulose
C	Glycogen
D	Chitin
E	Starch

Question 12

The ___ is the site where ribosomal RNA (rRNA) is transcribed and where ribosomes are assembled. (ID-B03-74)

A	Golgi apparatus
B	Nucleolus
C	Vesicles
D	Centriole
E	Rough endoplasmic reticulum

Question 13

Cell walls of bacteria is made up of what material? (ID-B03-63)

A	Chitin
B	Flagella
C	Peptidoglycan
D	Glucose

Question 14

Which of the following statement is correct about vacuoles in Endomembrane System? (ID-B03-70)

A	In plants, they store toxins to protect them from predators.
B	They process materials and produce usable energy for eukaryotic cells.
C	In humans, they acts as the digestive compartments within cells.
D	They are the transport vesicles that deliver glycoprotein from ER membrane to Golgi apparatus.

Question 15

How many different amino acids are found in proteins? (ID-B03-36)

A	20
B	Millions
C	50
D	35
E	100

Question 16

Which of the following components/substances are present in Red Blood Cells (RBCs)? (ID-B03-88)

A	Ribosomes, plasma membrane and hemoglobin.
B	Ribosomes, organelles and hemoglobin.
C	Plasma membrane and hemoglobin.
D	Nucleus, plasma membrane and hemoglobin.
E	Nucleus, ribosomes and hemoglobin.

Question 16 Explanation: 

Red Blood Cells do not have nucleus, organelles or ribosomes.

Question 17

Proteins are bonded by __I__ and these linking bounds are known as __II__. (ID-B03-33)

A	I. covalent bonds II. peptide bonds
B	I. ionic bonds II. nucleic bonds
C	I. covalent bonds II. nucleic bonds
D	I. ionic bonds II. peptide bonds

Question 18

The fimbriae of a typical prokaryotic cell has what purpose? (ID-B03-60)

A	Attaching to host surfaces.
B	Locomotion.
C	Isolation from the outside; like a cell wall.
D	Facilitate active transport and diffusion.

Question 18 Explanation: 

It is composed of β-sheet type proteins with a sticky end.

Question 19

Isotopes of same element have different amounts of what subatomic particle(s)? (ID-B03-73)

A	Protons and Electrons
B	Electrons
C	Neutrons
D	Protons and Neutrons
E	Protons

Question 19 Explanation: 

Example; the Carbon-12 have 6 neutrons while Carbon-14 has 8. But both have exactly same amount of protons and if they are not at a charged state, same amount of electrons as well.

Question 20

Which of the following class of biological molecules is responsible for the structure of water insoluble membranes? (ID-B03-23)

A	Proteins
B	Carbohydrates
C	Nucleic Acids
D	Lipids

Question 21

What is the primary function of RNAs? (ID-B03-45)

A	Develop new genetic codes for evolutionary adaptations.
B	Carry information of amino acid sequence from the genes to make proteins in cells.
C	Provide energy for the DNA structure by converting energy from cells into ATP and transferring it to the nucleus.
D	Protect the nucleus from genetic mutations, even though this always does not work.

Question 22

Arrange the following chemical groups diagrams from Hydroxyl, Carbonyl, Carboxyl, Amino, Phosphate and Methyl in that order. (ID-B03-75)

Suggestion: Take your time to answer this question. It can be confusing with 6 types!

A	IV , I , VI , V , II and III
B	VI , IV , III , II , V and I
C	VI , IV , II , V , III and I
D	IV , VI , III , II , V and I
E	I , III , IV , V , II and VI
F	IV , VI , II , III , V and I

Question 23

Why do manufactures use corn syrup derive fructose over glucose? (ID-B03-80)

A	Fructose is cheaper than glucose.
B	Fructose is a polymer while glucose is a monomer.
C	Fructose is sweeter than glucose.
D	There is more fructose naturally in corn syrup.

Question 24

Which of the following statement is true about biological cells? (ID-B03-51)

A	Both animal and plant cells contains materials that move around (mobile).
B	Natural carbon is only produced by plant cells.
C	Biological cells have the ability to differentiate Carbon-12 from Carbon-14.
D	Only the animal cells that have materials that move around (mobile).
E	Majority of organic cells lacks nucleus.

Question 25

Communication between cells is maintained through allowing molecules to flow by what type of cell junctions? (ID-B03-67)

A	Gap junctions
B	Membrane junctions
C	Messenger junctions
D	Anchoring junctions
E	Tight junctions

Question 26

A Carbon-14 atom (atomic number 6) that has lost an electron. What is the number of electrons remains? (ID-B03-72)

A	5 electrons.
B	10 electrons.
C	13 electrons.
D	8 electrons.
E	5 electrons.

Question 26 Explanation: 

Atomic number represents protons (+). A neutral atom will have equal number of protons (+) and electrons (-). If an electron is lost, then it must have one less electron than the atomic number.

Question 27

The phospholipids that form the plasma membrane allow non-polar molecules such as oxygen to move across the cell membrane. How is the ionic and polar molecules move across the membrane? (ID-B03-56)

A	Receptor proteins codes the ionic and polar molecules so that it will be accepted by the phospholipids.
B	Transport proteins form channels which allow ions and polar molecules to move across.
C	The difference in pH levels inside and outside the cell facilitates movement of ionic and polar molecules.
D	Simple diffusion process.

Question 28

What is the atomic mass number of 14
6 C? (ID-B03-04)

A	7
B	6
C	8
D	14

Question 29

Where are the hydrophilic and hydrophobic structures located on the following phospholipid diagram respectively? (ID-B03-48)

Image mod from: http://commons.wikimedia.org/wiki/File:0301_Phospholipid_Structure.jpg

A	III and I
B	I and III
C	I and IV
D	III and IV
E	IV and I

Question 30

Which of the following would you expect to observe on a person who is suffering from long term drug abuse? (ID-B03-66)

A	Increase production in glycoprotein.
B	Increase in rough endoplasmic reticulum.
C	Decrease production in glycoprotein.
D	Increase in smooth endoplasmic reticulum.

Question 31

What is the function of mitochondria in animal cells? (ID-B03-61)

A	Genetic control of the cell.
B	Energy processing.
C	Manufacture and distribution of molecules.
D	Provide structural support for the cell wall.
E	Provide structural support for the nucleus.

Question 31 Explanation: 

In plants, this function is carried out by chloroplasts.

Question 32

Which of the following statement is correct about microfilaments in the cytoskeleton? (ID-B03-68)

A	They are only found in plant cells because animal cells with movement cannot maintain the structure.
B	They are composed of action and involved in cell movement and maintaining cell structure.
C	They are composed of globular proteins that are assembled and disassembled in different regions of the cell to form hollow pathways.
D	They made the various fiberous proteins of α-helical coiled-coils that transport materials from one area to another.

Question 33

Why dissolution of CO₂ in ocean water result in ocean acidification? (ID-B03-77)

A	Because CO2 reacts with calcium to produce bicarbonate.
B	Because CO2 acts as a low pH buffer.
C	Because CO2 is an acid.
D	Because CO2 reacts with water to produce carbonic acid.

Question 34

Which of the following statement is true about monosaccharides? (ID-B03-25)

A	They often form ring structures.
B	Their molecular formulas are usually multiples of CH2O2.
C	Most common two; glucose forms 5 membered structures while fructose forms 6 membered structure.
D	They usually characterized by three double bonded C-O structures.

Question 35

What is a chemical buffer? (ID-B03-49)

A	A substance that increase the pH level of a high pH solution while decrease the pH level of a low pH solution.
B	A substance that prevent changes in pH by accepting or donating hydrogen irons.
C	A substance that prevent genetic mutations.
D	A substance that resists changes in pH by accepting or donating hydrogen irons.
E	A substance that resists genetic mutations.

Question 36

What is the abundance of most stable isotope of carbon, the Carbon-12, in nature? (ID-B03-08)

A	65%
B	75%
C	100%
D	50%
E	99%

Question 37

What criterion is used to classify an element as "trace element" in humans by Biologists? (ID-B03-71)

A	The elemental abundance must be less than 0.01% of the human body weight.
B	The elemental abundance must be less than 0.4% of the human body weight.
C	The elemental abundance must be less than 1.0% of the human body weight.
D	The elemental abundance must be less than 0.2% of the human body weight.
E	The elemental abundance must be less than 0.1% of the human body weight.

Question 38

What is the length range (size range) for most animal and plant cells? (ID-B03-53)

A	0.1 to 1.0 micrometres
B	1.0 to 10 micrometres
C	10 to 100 micrometres
D	100 to 1000 micrometres

Question 39

Choose the correct statement(s) from the following list. (ID-B03-13)

I. Covalent bonds are stronger than ionic bonds.
II. Chemical reactions always result in loss of electron(s).
III. Water is slightly polar.
IV. Ionic bonds are bound together with oppositely charged ions.

A	I , III and IV
B	I and III
C	I , II and III
D	I and II
E	All of the above statements are correct.
F	II and IV

Question 40

Which of the following is the functional group of fatty acids? (ID-B03-90)

A	Carboxyl group
B	Hydroxyl group
C	Phosphate group
D	Amino group
E	Carbonyl group

Question 41

How many different types of White Blood Cells (WBCs) have been identified? (ID-B03-87)

A	4
B	5
C	3
D	6
E	2

Question 42

Hydrogen ion (H⁺) and hydroxide ion (OH^-) are highly reactive. They play a major role in what process? (ID-B03-19)

A	Vital hormone producing reactions
B	Hydrogen bonding
C	Acid-base reactions
D	Chemical precipitation reactions

Question 43

What theory state that mitochondria and plastids, including chloroplasts, originated as prokaryotic cells engulfed by a host cell? (ID-B03-85)

A	Cell theory
B	Endosymbiont theory
C	Theory of inheritance
D	Genetic theory

Question 44

The H-bonding networks in proteins is at what level of structure? (ID-B03-34)

A	Primary structure:
B	Secondary structure
C	Quaternary structure
D	Tertiary structure

Question 45

What are the general parts of a nucleotide? (ID-B03-83)

A	3-carbin sugar, phosphate group and a adenine
B	5-carbin sugar, phosphate group and a nitrogenous base
C	5-carbin sugar, phosphate group and a adenine Hint: While it is true a adenine can be one, it is not a general part!
D	3-carbin sugar, phosphate group and a nitrogenous base

Question 46

Alberta has considerable deposits of Uranium. What cancer causing gas is produced as a result of Uranium decay? (ID-B03-10)

A	Radon gas
B	Natural gas
C	Thorium gas
D	Sulfur mustard gas

Question 47

Which of the following statement is correct about DNA double helix? (ID-B03-40)

A	The base A pairs with base G while base C pairs with base T to form a double helix RNA.
B	The base A pairs with base T while base G pairs with base T to form a double helix RNA.
C	The base A pairs with base C while base G pairs with base T to form a double helix RNA.
D	The base A pairs with base C while base G pairs with base T to form a double helix DNA.
E	The base A pairs with base G while base C pairs with base T to form a double helix DNA.
F	The base A pairs with base T while base C pairs with base G to form a double helix DNA.

Question 48

How many different nitrogenous bases that made up of DNA structures? (ID-B03-39)

A	5
B	6
C	3
D	2
E	4

Question 49

Which of the following statement is incorrect about RNA? (ID-B03-42)

A	Only the tRNA structure is linear.
B	Coding of the proteins is done by mRNAs.
C	The tRNA carries amino acids with high energy bound for making proteins.
D	Only the mRNA structure is linear.

Question 50

Which of the following integral membrane protein in Red Blood Cells (RBCs) provide gel-like barrier outside the cell? (ID-B03-89)

A	Ankrin protein
B	Band 3 protein
C	Spectrin protein
D	Aquaporins protein
E	Glycophorin protein

Question 51

Organic chemical reactions takes place... (ID-B03-76)

A	...always outside cell walls.
B	...by heating the reactants.
C	...only by breaking covalent bonds because living cells cannot break down ionic bonds.
D	...in aqueous environment of cells.

Question 52

Atoms are split/sub-divided into how many subatomic particles? (ID-B03-07)

A	Hundreds of subatomic particles.
B	Five subatomic particles.
C	Two subatomic particles.
D	Three subatomic particles.

Question 52 Explanation: 

Although we have identified more than hundreds of subatomic particles, there are three important ones; Protons, Neutrons and Electrons. Read more at Wikipedia

Question 53

There are ___ elements essential to life and the four most abundant includes hydrogen, oxygen, carbon and ___. (ID-B03-01)

A	15 , sodium
B	22 , sodium
C	25 , nitrogen
D	15, iron
E	22 , iron
F	15 , nitrogen

Question 54

Cells are the simplest collection of matter that can live. We use microscopes to study them. Which microscope would you use if you were to study intracellular structures? (ID-B03-52)

A	Electron Microscope (EM)
B	Transmission Electron Microscope (TEM)
C	Scanning Electron Microscope (SEM)
D	Light Microscope (LM)

Question 55

A person who consumes a lot of fructose most likely experience... (ID-B03-27)

A	...high cholesterol.
B	...obesity.
C	...diabetes.
D	...thyroid problems.

Question 55 Explanation: 

Fructose that usually found in HFCS (corn syrup) increases the production of fats. Fructose does not give rise to an insulin response.

Question 56

Fats come from animals are generally... (ID-B03-44)

A	...contain more nutrition than plant based fats.
B	...good for human health/digestive system.
C	...solid at room temperature.
D	...unsaturated fats.

Question 57

Which of the following statement is correct about saturated fats? (ID-B03-43)

A	They have kinks caused by double bonding of carbon atoms.
B	They have the maximum number of hydrogens (alkanes) in the fats and lipid group.
C	Compared to unsaturated fatty acids, they have a very high melting point.
D	They are often found in olive oil and vegetable oils.

Question 58

What is good for human health? (ID-B03-47)

A	More cholesterol within the lipoprotein, hence away from the blood.
B	More triglycerides within the lipoprotein, hence away from the blood.
C	A very low LDL to HDL ratio.
D	A very high LDL to HDL ratio.

Question 58 Explanation: 

Medical professionals do not measure the LDL or HDL levels when testing for cholesterol. They test the ratio of LDL/HDL. HDL is good for health and therefore lower the ratio, even if it very high, better it is for the body.

Question 59

What is chemotaxis? (ID-B03-64)

A	Movement of an organism in response to a chemical stimulus.
B	Process in which chemical difference between inside and outside the cell is maintained.
C	Production of proteins by the bone marrow to keep stable white blood cell count.
D	A digestive process used by herbivorous to break down the plant cells.

Question 59 Explanation: 

This is how Bacteria sense food.

Question 60

How is lipids different from other large biological molecules? (ID-B03-29)

A	They are the largest biological molecules.
B	They can form many different shapes with random orientations.
C	They are nonploar and therefore hydrophilic.
D	They do not form polymers.

Question 61

Lactose intolerant is caused due to lack of lactase enzyme, which hydrolyse what glycosidic bonds? (ID-B03-26)

A	α−1-->4
B	β−1-->1
C	α−1-->1
D	β−1-->4

Question 62

Which of the following statement is true about enzymes? (ID-B03-81)

A	They speed up chemical reactions without participating in the reaction.
B	They slow down chemical reaction by participating in the reaction.
C	They slow down chemical reaction by acting as a buffer.
D	They speed up chemical reactions by participating in the reaction.

Question 63

How is nitrogenous bases of RNA differ from that of DNA? (ID-B03-38)

A	RNA has Cytosine (Cyt) nitrogenous base instead of Adenine (Ade).
B	RNA has Uracil (Ura) nitrogenous base instead of Thymine (Thy).
C	RNA has Thymine (Thy) nitrogenous base instead of Cytosine (Cyt).
D	RNA has Adenine (Ade) nitrogenous base instead of Cytosine (Cyt).
E	RNA has Thymine (Thy) nitrogenous base instead of Adenine (Ade).
F	RNA has Guanine (Gua) nitrogenous base instead of Cytosine (Cyt).

Question 64

Which of the following that both prokaryotic and eukaryotic cells have? (ID-B03-57)

A	Nucleus
B	DNA as genetic materials
C	Organelles
D	Cell walls

Question 64 Explanation: 

Note all prokaryotic cells have cell walls.

Question 65

Only the ionic compounds will effectively dissolve in water. (ID-B03-18)

A	True
B	False

Question 65 Explanation: 

Water can dissolve ionic compounds and polar molecules.

Question 66

The classification organic compounds is based on the presence of what elements? (ID-B03-03)

A	Hydrogen, Carbon and Oxygen
B	Nitrogen and Oxygen
C	Carbon, Oxygen and Nitrogen
D	Carbon and Hydrogen
E	Hydrogen and Oxygen
F	Hydrogen, Oxygen and Nitrogen

Question 67

All living things are composed of cells and that all cells come from other cells. What is this statement describing? (ID-B03-84)

A	Molecular theory
B	Genetic theory
C	Theory of evolution
D	Cell theory
E	Laws of inheritance

Question 68

If you want to increase the internal temperature of Canadian moose dung while cooking, what should you do? (ID-B03-16)

Note: Moose dung is a traditional Canadian delicacy. Yum yum 🙂

A	Freeze the dung before cooking.
B	Decrease the humidity of the cook pot.
C	Increase the humidity of the cook pot.
D	Add salts, ionic compounds, to the moose dung.

Question 69

Which of the following hydrocarbon that has a cyclic (ring) structure? (ID-B03-78)

A	Benzene
B	Butane
C	Ethane
D	Methane

Question 70

What type of blood cells are formed in a process called erythropoiesis? (ID-B03-69)

A	White blood cells
B	Serum
C	Platelets
D	Red blood cells

Question 71

Why is the area/volume ratio has to be very small for biological cells to survive? (ID-B03-55)

A	To allow nutrients and gasses to pass across the cell surface.
B	To be able to communicate to the outside world.
C	To be able to process food and data.
D	To be able to stack together to form tissues.

Question 71 Explanation: 

Bit of tricky question because you may argue for few other answers listed above. However, there is a specific reason and that's what this question is asking for.

Question 72

You take a spoon full of cocoa powder and mix it in milk. Assuming no isolated reactions occurred, which of the statement is most likely describes your cocoa milk shake? (ID-B03-17)

A	The mixing of the two most likely have broken down the molecular bounds of water and that resulted in reaction with cocoa powder.
B	The temperature of the mixture should have increased as the mixing progresses.
C	The milk acted as the solute which breaks down the chemical compounds in the cocoa powder.
D	Milk is the solvent while cocoa powder is the solute.

Question 73

Chemically why water is important to life? (ID-B03-14)

A	Very high reaction rate.
B	Very high electron transfer rate and high electrical conduction rate.
C	The physical properties such as very low angles between the two H-atoms and the O-atom.
D	The chemical properties such as high cohesion and polarity.

Question 74

The surface tension of water is vital to organisms. Why does water has high surface tension? (ID-B03-50)

A	Low radioactivity and polarity.
B	The hydrogen bonds.
C	The very high electronegative nature of the molecule.
D	The high atomic mass.

Question 75

What is the function of flagella on prokaryotic cells? (ID-B03-59)

A	Locomotion.
B	Provide structural support.
C	Protection from the outside environment.
D	DNA and RNA replication.
E	Enzyme and proteins synthesis.

Question 76

A solution at pH 6 contains ___ than the same amount of solution at pH 4. (ID-B03-20)

A	100 times less H+
B	100 times more H+
C	2 times more H+
D	10 times more H+
E	10 times less H+

Question 76 Explanation: 

pH = -log₁₀[H⁺]
[H⁺] = 10^-pH

Question 77

Plants store polysaccharides as what compound? (ID-B03-30)

A	Cellulose
B	Starch
C	Glycogen
D	Carboxylic acids

Question 78

Iodine (I) is an essential trace element used to produce hormones by which gland? (ID-B03-06)

A	Thyroid gland
B	Pituitary gland
C	Pineal gland
D	Prostate gland
E	Salivary gland

Question 79

Which of the organic compounds illustrated below has a double bond? (ID-B03-21)

Image mod from: http://en.wikipedia.org/wiki/Ethyl_group

A	II and IV
B	I, II and IV
C	IV only
D	III only
E	I only
F	II only

Question 80

Living cells have the amazing ability to distinguish different isotopes of the same element. (ID-B03-09)

A	False
B	True

Question 81

Which of the following is a polysaccharide? (ID-B03-28)

A	Cellulose
B	Maltose
C	Glucose
D	Fructose

Question 82

The chitin is a ____ and it is used by insects and crustaceans to build their exoskeleton. (ID-B03-35)

A	polysaccharide
B	monsaccharide
C	lipid
D	disaccharide
E	protein

Question 83

Which of the following occur during a chemical reaction? (ID-B03-11)

A	Neutrons and protons from different atoms react with each other.
B	Valance shell electrons react with other atoms to form bonds.
C	Produce molecules and compounds with polarity. Hint: Not always, but sometimes.
D	Number of electrons within the structure increases. Hint: Not always, but sometimes.

Question 84

What is the difference between a compound and a molecule? (ID-B03-02)

A	Molecules easily react with organic matter therefore they often involved in chemical reactions. Compounds are stable entities and are often inert.
B	Compounds composed of two or more different elements while molecules composed of two or more atoms.
C	Molecules are always ionic while compounds could be either ionic or covalent.
D	All organic matter is compounds while molecules are inorganic.
E	Molecules composed of two or more different elements while compounds composed of two or more atoms.

Question 85

Which of the following statements are true about protein structure? (ID-B03-82)

A	Protein structures have four levels of structures.
B	Hydrogen bonds are primary structures of proteins.
C	Some proteins only have α helix structures while others can have only β pleated sheet structures.
D	The α helix and the β pleated sheet structures are tertiary structure.

Question 85 Explanation: 

Note: Only some proteins have four levels while most have three levels of structures.

Question 86

An unknown element has 6 protons and 8 neutrons. Which of the following element is most likely fit this atomic description? (ID-B03-05)

A	Carbon-12
B	Helium-4
C	Carbon-14
D	Carbon-13
E	Nitrogen-12

Question 86 Explanation: 

By calculating the atomic mass number with the given data, the ONLY possible answer is Carbon-14.

Question 87

What type of cell junction in animal cells provide the similar function as plasmodesmata in plant cells? (ID-B03-86)

A	Gap junctions
B	Anchoring junctions
C	Fiber junctions
D	Tight junctions

Question 88

DNA is made in a process called __I__ while RNA is made in a process called __II__. (ID-B03-24)

A	I. transcription II. translation
B	I. replication II. translation
C	I. transcription II. replication
D	I. replication II. transcription
E	I. translation II. replication
F	I. translation II. transcription

Question 89

All of the following chemical groups are hydrophilic except, (ID-B03-22)

A	Carbonyl group
B	Phosphate group
C	Methyl group
D	Amino group
E	Hydroxyl group
F	Carboxyl group

Question 90

With the development of advanced microscopes, why would you still use a light microscope? (ID-B03-54)

A	Light microscopes are cheaper for a biologist to obtain.
B	Movement of organic material is magnified in advanced microscopes hence harder to study.
C	The techniques used to study microscopic particles in cell biology has not changed since 1665.
D	There is a world wide shortage of advanced microscopes.

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