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

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

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

Question 1 Explanation: 

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

Question 2

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

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

Question 3

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	Protein structures have four levels of structures.
C	The α helix and the β pleated sheet structures are tertiary structure.
D	Hydrogen bonds are primary structures of proteins.

Question 3 Explanation: 

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

Question 4

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

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

Question 5

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

Question 6

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

Question 7

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

A	Ethane
B	Butane
C	Benzene
D	Methane

Question 8

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

A	Nucleic Acids
B	Proteins
C	Lipids
D	Carbohydrates

Question 9

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

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

Question 9 Explanation: 

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

Question 10

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

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

Question 11

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	Genetic theory
C	Cell theory
D	Endosymbiont theory

Question 12

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

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

Question 13

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

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

Question 13 Explanation: 

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

Question 14

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

Question 14 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 15

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

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

Question 16

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

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

Question 17

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

A	2
B	6
C	5
D	3
E	4

Question 18

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

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

Question 19

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

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

Question 20

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

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

Question 21

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	10 electrons.
C	8 electrons.
D	5 electrons.
E	5 electrons.

Question 21 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 22

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

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

Question 23

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

Question 24

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

Question 25

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

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

Question 25 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 26

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

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

Question 27

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

Question 28

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

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

Question 29

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

A	All organic matter is compounds while molecules are inorganic.
B	Compounds composed of two or more different elements while molecules composed of two or more atoms.
C	Molecules composed of two or more different elements while compounds composed of two or more atoms.
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 30

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	There is a world wide shortage of advanced microscopes.
D	Movement of organic material is magnified in advanced microscopes hence harder to study.

Question 31

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	Electron Microscope (EM)
C	Scanning Electron Microscope (SEM)
D	Transmission Electron Microscope (TEM)

Question 32

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

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

Question 33

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

A	Glycogen
B	Starch
C	Chitin
D	Lipids
E	Cellulose

Question 34

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

Question 35

What is chemotaxis? (ID-B03-64)

A	Process in which chemical difference between inside and outside the cell is maintained.
B	Movement of an organism in response to a chemical stimulus.
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 35 Explanation: 

This is how Bacteria sense food.

Question 36

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

Question 37

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	Only the mRNA structure is linear.
D	The tRNA carries amino acids with high energy bound for making proteins.

Question 38

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

A	True
B	False

Question 39

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 39 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 40

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 40 Explanation: 

In plants, this function is carried out by chloroplasts.

Question 41

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

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

Question 42

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

Question 43

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

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

Question 43 Explanation: 

Note all prokaryotic cells have cell walls.

Question 44

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, Carbon and Oxygen
D	Carbon, Oxygen and Nitrogen
E	Nitrogen and Oxygen
F	Hydrogen, Oxygen and Nitrogen

Question 45

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 46

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

A	6
B	5
C	3
D	2
E	4

Question 47

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

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

Question 48

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	Simple diffusion process.
D	The difference in pH levels inside and outside the cell facilitates movement of ionic and polar molecules.

Question 49

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 50

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

Question 51

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

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

Question 52

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

Question 53

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

Question 54

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

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

Question 55

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

A	7
B	6
C	8
D	14

Question 56

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 57

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

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

Question 58

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

Question 59

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

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

Question 60

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

Question 61

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

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

Question 62

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

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

Question 63

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-->4
C	β−1-->1
D	α−1-->4

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	Protect the nucleus from genetic mutations, even though this always does not work.
D	Provide energy for the DNA structure by converting energy from cells into ATP and transferring it to the nucleus.

Question 65

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

A	A substance that resists genetic mutations.
B	A substance that prevent genetic mutations.
C	A substance that resists changes in pH by accepting or donating hydrogen irons.
D	A substance that prevent 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 66

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

A	Carboxylic acids
B	Cellulose
C	Glycogen
D	Starch

Question 67

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

A	disaccharide
B	monsaccharide
C	lipid
D	protein
E	polysaccharide

Question 68

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

Question 69

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

A	Hydrolysis
B	ATP injection
C	Protein pumps
D	Heating

Question 70

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	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 71

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

Question 72

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

A	50
B	100
C	Millions
D	35
E	20

Question 73

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

Question 73 Explanation: 

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

Question 74

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

A	Chitin
B	Peptidoglycan
C	Glucose
D	Flagella

Question 75

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

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

Question 76

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

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

Question 77

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

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

Question 78

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

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

Question 79

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

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

Question 80

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

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

Question 81

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

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

Question 81 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 82

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

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

Question 82 Explanation: 

pH = -log₁₀[H⁺]
[H⁺] = 10^-pH

Question 83

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

A	3
B	5
C	2
D	4

Question 83 Explanation: 

They are mRNA, tRNA and rRNA.

Question 84

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

Question 85

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	1/30th of a typical prokaryotic celll.
D	1/25th of a typical prokaryotic celll.
E	1/10th of a typical prokaryotic celll.

Question 86

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

A	Glucose
B	Cellulose
C	Maltose
D	Fructose

Question 87

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

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

Question 88

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

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

Question 89

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	Vital hormone producing reactions
C	Hydrogen bonding
D	Acid-base reactions

Question 90

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

A	False
B	True

Question 90 Explanation: 

Water can dissolve ionic compounds and polar molecules.

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