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

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

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

Question 2

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

A	False
B	True

Question 2 Explanation: 

Water can dissolve ionic compounds and polar molecules.

Question 3

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	Aquaporins protein
C	Glycophorin protein
D	Spectrin protein
E	Band 3 protein

Question 4

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

Question 4 Explanation: 

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

Question 5

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	Process in which chemical difference between inside and outside the cell is maintained.
D	Production of proteins by the bone marrow to keep stable white blood cell count.

Question 5 Explanation: 

This is how Bacteria sense food.

Question 6

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

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

Question 7

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

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

Question 8

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

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

Question 9

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

A	protein
B	polysaccharide
C	monsaccharide
D	disaccharide
E	lipid

Question 10

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	β−1-->4
D	α−1-->1

Question 11

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

A	Starch
B	Cellulose
C	Chitin
D	Lipids
E	Glycogen

Question 12

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

A	2
B	6
C	5
D	3
E	4

Question 13

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

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

Question 14

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

Question 15

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

Question 16

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

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

Question 17

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

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

Question 18

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

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

Question 19

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 20

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

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

Question 20 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 21

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

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

Question 21 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 22

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	The α helix and the β pleated sheet structures are tertiary structure.
D	Protein structures have four levels of structures.

Question 22 Explanation: 

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

Question 23

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

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

Question 23 Explanation: 

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

Question 24

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

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

Question 25

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

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

Question 26

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

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

Question 27

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

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

Question 28

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

A	Carbohydrates
B	Lipids
C	Proteins
D	Nucleic Acids

Question 29

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

A	5
B	3
C	6
D	2
E	4

Question 30

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

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

Question 31

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

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

Question 32

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

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

Question 34

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

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

Question 34 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 35

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

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

Question 36

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	10 times less H+
E	2 times more H+

Question 36 Explanation: 

pH = -log₁₀[H⁺]
[H⁺] = 10^-pH

Question 37

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

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

Question 38

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

A	3
B	5
C	4
D	2

Question 38 Explanation: 

They are mRNA, tRNA and rRNA.

Question 39

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

Question 40

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

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

Question 41

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

Question 42

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

A	100
B	20
C	35
D	Millions
E	50

Question 43

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

Question 44

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

Question 45

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

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

Question 46

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

A	Glucose
B	Flagella
C	Peptidoglycan
D	Chitin

Question 47

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

Question 48

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	Forms cell membranes.
D	Energy storage and release.

Question 49

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

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

Question 50

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

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

Question 50 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 51

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 52

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

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

Question 53

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

A	6
B	14
C	7
D	8

Question 54

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

A	Methane
B	Ethane
C	Benzene
D	Butane

Question 55

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 56

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

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

Question 56 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 57

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

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

Question 57 Explanation: 

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

Question 58

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

Question 59

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 60

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

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

Question 61

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	Vital hormone producing reactions
C	Chemical precipitation reactions
D	Acid-base reactions

Question 62

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 63

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

Question 64

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

A	Glucose
B	Fructose
C	Maltose
D	Cellulose

Question 65

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	...unsaturated fats.
D	...solid at room temperature.

Question 66

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

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

Question 67

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

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

Question 68

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

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

Question 69

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

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

Question 70

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

Question 71

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

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

Question 71 Explanation: 

Note all prokaryotic cells have cell walls.

Question 72

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

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

Question 73

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 resists genetic mutations.
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 74

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

A	Hydrolysis
B	Protein pumps
C	ATP injection
D	Heating

Question 75

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

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

Question 76

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

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

Question 77

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

A	Heat is produced through instantaneous reactions such as boiling water. Temperature is the quantitative measurement of heat.
B	Temperature is a long term quantitative measurement of energy while heat is a short term measurement of energy.
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 78

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 79

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

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

Question 80

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

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

Question 81

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

A	False
B	True

Question 82

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

A	Carboxylic acids
B	Starch
C	Glycogen
D	Cellulose

Question 83

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

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

Question 83 Explanation: 

In plants, this function is carried out by chloroplasts.

Question 84

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

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

Question 85

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

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

Question 86

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

A	They are composed of globular proteins that are assembled and disassembled in different regions of the cell to form hollow pathways.
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 action and involved in cell movement and maintaining cell structure.

Question 87

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

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

Question 88

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

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

Question 88 Explanation: 

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

Question 89

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

Question 90

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

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

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