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

Question 2

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

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

Question 3

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	The hydrogen bonds.
D	Low radioactivity and polarity.

Question 4

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

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

Question 5

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

A	4
B	5
C	3
D	2

Question 5 Explanation: 

They are mRNA, tRNA and rRNA.

Question 6

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

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

Question 7

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

A	Protein pumps
B	ATP injection
C	Heating
D	Hydrolysis

Question 8

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

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

Question 9

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

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

Question 9 Explanation: 

pH = -log₁₀[H⁺]
[H⁺] = 10^-pH

Question 10

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

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

Question 11

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

A	Chitin
B	Flagella
C	Peptidoglycan
D	Glucose

Question 12

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

Question 13

What is chemotaxis? (ID-B03-64)

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

Question 13 Explanation: 

This is how Bacteria sense food.

Question 14

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

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

Question 15

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

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

Question 16

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

A	True
B	False

Question 17

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

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

Question 18

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 19

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	They are often found in olive oil and vegetable oils.
D	Compared to unsaturated fatty acids, they have a very high melting point.

Question 20

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

Question 21

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

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

Question 22

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

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

Question 23

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	IV and I
D	III and IV
E	I and IV

Question 24

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 24 Explanation: 

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

Question 25

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

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

Question 25 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 26

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

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

Question 27

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

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

Question 28

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	Radon gas
C	Thorium gas
D	Sulfur mustard gas

Question 29

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

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

Question 29 Explanation: 

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

Question 30

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

Question 30 Explanation: 

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

Question 31

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	Simple diffusion process.
B	Receptor proteins codes the ionic and polar molecules so that it will be accepted by the phospholipids.
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 32

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

Question 33

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

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

Question 34

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

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

Question 35

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

A	Nucleic Acids
B	Carbohydrates
C	Lipids
D	Proteins

Question 36

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

A	False
B	True

Question 36 Explanation: 

Water can dissolve ionic compounds and polar molecules.

Question 37

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	Aquaporins protein
D	Spectrin protein
E	Glycophorin protein

Question 38

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

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

Question 39

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	Molecules easily react with organic matter therefore they often involved in chemical reactions. Compounds are stable entities and are often inert.
D	Molecules are always ionic while compounds could be either ionic or covalent.
E	All organic matter is compounds while molecules are inorganic.

Question 40

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

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

Question 41

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

A	The chemical properties such as high cohesion and polarity.
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	Very high reaction rate.

Question 42

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

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

Question 43

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

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

Question 44

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

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

Question 45

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

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

Question 45 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 46

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

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

Question 47

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 high LDL to HDL ratio.
D	A very low LDL to HDL ratio.

Question 47 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 48

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 composed of globular proteins that are assembled and disassembled in different regions of the cell to form hollow pathways.
D	They are only found in plant cells because animal cells with movement cannot maintain the structure.

Question 49

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

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

Question 50

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

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

Question 50 Explanation: 

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

Question 51

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

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

Question 52

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

A	protein
B	lipid
C	monsaccharide
D	polysaccharide
E	disaccharide

Question 53

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

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

Question 54

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

Question 55

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

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

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

Question 57

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

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

Question 58

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

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

Question 58 Explanation: 

Note all prokaryotic cells have cell walls.

Question 59

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. translation II. transcription
D	I. translation II. replication
E	I. replication II. transcription
F	I. transcription II. replication

Question 60

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

A	Chitin
B	Starch
C	Lipids
D	Glycogen
E	Cellulose

Question 61

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

Question 62

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

A	20
B	100
C	35
D	50
E	Millions

Question 63

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

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

Question 63 Explanation: 

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

Question 64

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

A	Carry information of amino acid sequence from the genes to make proteins in cells.
B	Develop new genetic codes for evolutionary adaptations.
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 65

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

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

Question 66

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

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

Question 67

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

A	6
B	4
C	2
D	5
E	3

Question 68

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

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

Question 69

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

Question 70

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

A	6
B	8
C	14
D	7

Question 71

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

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

Question 72

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

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

Question 73

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

Question 74

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

A	Methane
B	Butane
C	Ethane
D	Benzene

Question 75

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

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

Question 75 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 76

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

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

Question 77

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

A	4
B	2
C	6
D	3
E	5

Question 78

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

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

Question 78 Explanation: 

In plants, this function is carried out by chloroplasts.

Question 79

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

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

Question 80

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

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

Question 81

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

Question 82

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

A	Only the mRNA 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 tRNA structure is linear.

Question 83

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

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

Question 84

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

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

Question 85

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

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

Question 86

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

A	Glycogen
B	Carboxylic acids
C	Starch
D	Cellulose

Question 87

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	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 88

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

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

Question 88 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 89

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

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

Question 90

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

A	Glucose
B	Maltose
C	Fructose
D	Cellulose

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