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

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

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

Question 2

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

Question 3

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

A	Cellulose
B	Glucose
C	Maltose
D	Fructose

Question 4

What is chemotaxis? (ID-B03-64)

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

Question 4 Explanation: 

This is how Bacteria sense food.

Question 5

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

A	Hydrolysis
B	Protein pumps
C	Heating
D	ATP injection

Question 6

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

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

Question 7

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	Milk is the solvent while cocoa powder is the solute.
C	The temperature of the mixture should have increased as the mixing progresses.
D	The milk acted as the solute which breaks down the chemical compounds in the cocoa powder.

Question 8

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

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

Question 9

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

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

Question 10

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

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

Question 11

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

Question 12

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

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

Question 12 Explanation: 

pH = -log₁₀[H⁺]
[H⁺] = 10^-pH

Question 13

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

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

Question 14

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

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

Question 14 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 15

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

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

Question 16

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

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

Question 17

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

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

Question 18

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

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

Question 19

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

Question 20

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

A	Glycogen
B	Cellulose
C	Carboxylic acids
D	Starch

Question 21

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

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

Question 22

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	Theory of evolution
C	Cell theory
D	Laws of inheritance
E	Genetic theory

Question 23

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

A	Peptidoglycan
B	Glucose
C	Flagella
D	Chitin

Question 24

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

Question 25

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 25 Explanation: 

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

Question 26

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

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

Question 27

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

Question 28

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

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

Question 29

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

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

Question 30

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

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

Question 30 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 31

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

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

Question 31 Explanation: 

In plants, this function is carried out by chloroplasts.

Question 32

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	Simple diffusion process.
C	Transport proteins form channels which allow ions and polar molecules to move across.
D	The difference in pH levels inside and outside the cell facilitates movement of ionic and polar molecules.

Question 33

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

A	5-carbin sugar, phosphate group and a nitrogenous base
B	3-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 adenine

Question 34

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

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

Question 35

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

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

Question 36

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 36 Explanation: 

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

Question 37

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

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

Question 38

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

A	Lipids
B	Cellulose
C	Chitin
D	Starch
E	Glycogen

Question 39

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

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

Question 40

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

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

Question 41

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

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

Question 42

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

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

Question 43

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

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

Question 44

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

Question 45

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

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

Question 46

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	...lower the pull of electrons towards its nucleus.
E	...higher the pull of electrons towards its nucleus.

Question 47

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

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

Question 48

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

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

Question 48 Explanation: 

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

Question 49

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

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

Question 50

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

A	3
B	4
C	5
D	2
E	6

Question 51

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

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

Question 52

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

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

Question 52 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 53

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

A	3
B	2
C	4
D	5

Question 53 Explanation: 

They are mRNA, tRNA and rRNA.

Question 54

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

Question 55

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

Question 56

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

Question 57

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

A	3
B	4
C	5
D	2
E	6

Question 58

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

A	8
B	14
C	7
D	6

Question 59

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

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

Question 60

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

A	False
B	True

Question 61

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

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

Question 61 Explanation: 

Note all prokaryotic cells have cell walls.

Question 62

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

A	protein
B	lipid
C	polysaccharide
D	monsaccharide
E	disaccharide

Question 63

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

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

Question 64

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

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

Question 65

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

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

Question 66

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

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

Question 67

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

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

Question 68

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

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

Question 69

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	Theory of inheritance
C	Genetic theory
D	Endosymbiont theory

Question 70

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

Question 70 Explanation: 

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

Question 71

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

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

Question 72

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 stack together to form tissues.
C	To be able to communicate to the outside world.
D	To be able to process food and data.

Question 72 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 73

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

A	Butane
B	Ethane
C	Benzene
D	Methane

Question 74

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

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

Question 75

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

Question 76

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 77

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-->4
C	β−1-->1
D	α−1-->1

Question 78

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

A	50
B	35
C	Millions
D	20
E	100

Question 79

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

A	True
B	False

Question 79 Explanation: 

Water can dissolve ionic compounds and polar molecules.

Question 80

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

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

Question 81

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

Question 82

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	Heat is the amount of energy associated with movement of atoms while temperature is the intensity of heat (average speed of atoms).
D	Temperature is the amount of energy associated with movement of atoms while heat is the intensity of heat (average speed of atoms).

Question 83

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

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

Question 83 Explanation: 

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

Question 84

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

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

Question 85

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

A	Proteins
B	Lipids
C	Carbohydrates
D	Nucleic Acids

Question 86

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

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

Question 87

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

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

Question 88

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

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

Question 89

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

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

Question 90

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

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

Question 90 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.

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