Quiz: exam 1


exam 1Online version 46 questions on physiology by a. G. 1 The level of protein structure primarily involved in determining enzyme activity is the a Tertiary enzyme b secondary enzyme c primary enzyme d quaternary enzyme 2 Regulation of a metabolic pathway by the final product of the pathway is termed a Both end-product inhibition and negative feedback b end-product inhibition c allosteric inhibition d negative feedback 3 Enzymes that remove hydrogen atoms from their substrates are referred to as a catalases b hydrolases c peroxidases d dehydrogenases 4 What enzyme breaks the hydrogen bonds between the bases of DNA in preparation for replication? a rRNA b dehysrogenases c DNA helicase 5 Bonds that are formed between oxygen and hydrogen atoms within water molecules are called a nonpolar covalent bonds b polar covalent bonds c ionic bonds d hydrogen bonds 6 A codon codes for a mRNA b fatty acid c amino acid d carbs 7 The addition of water with the proper enzymes to a molecule is called a dehydration synthesis b combustion c condensation d hydrolysis 8 Negative feedback results in a response that opposes the original deviation from normal a false b true 9 Hydrogen bonds form between the partially charged atoms of 2 polar molecules, such as the slightly positively charged hydrogen atom of one water molecule and the slightly negatively charged oxygen atom of another. a false b true 10 Glucose and lactose are structural isomers that can be used immediately by cells to create ATP a False b true 11 Molecules that contain carbon and hydrogen atoms are a Organic molecules b inorganic molecules c molecules 12 Chromatin that is active in genetic transcription is called a heterochromatin b euchromatin c homochromatic d embryonic chromatin 13 Protein synthesis utilizes ___ as the template copy from DNA a rRNA b mRNA c tRNA 14 A chemical reaction rate can be increased by either ___ the temperature or ___ the activation energy a Increasing; decreasing b increasing; increasing c decreasing; decreasing d decreasing; increasing 15 In DNA, cytosine forms a complementary base pair with adenine a False b true 16 When an atom loses one or more electrons, it becomes a Positively charged b an isotope c negatively charged d an anion 17 The term proteome refers to all the genes in a particular individual a False b true 18 How many single bonds can a carbon atom form if it is double-bonded to an oxygen atom? a 2 b 1 c 3 d 4 e 5 19 Molecules with the same atoms, in the same sequence, but arranged differently in space are called a structural isomer b functional groups c aromatic molecules d stereoisomers 20 RNA that has the function of bringing amino acids to the ribosome during translation is called ___ RNA a ribosomal b messenger c nuclear d transfer 21 The process of gene expression occurs as genetic a Transcription and genetic translation b translation and genetic degradation c transcription and genetic transduction d transduction and genetic degradation 22 What holds a protein in its tertiary structure? a Both weak chemical bonds between widely spaced amino acids and disulfide bonds between sulfur groups on cysteines are correct b hyrogen bonds between nearby amino acids c disulfide bonds between sulfur groups on cysteines d weak chemical bonds between widely spaced amino acids 23 The conversion of glucose to galactose would be catalyzed by an isomerase enzyme a false b true 24 An atom with 5 protons, 5 neutrons, and 6 electrons would have a net charge of a +1 b -1 c -2 d +2 25 Peptide bonds are formed by the process of a ketosis b hydrolysis c dehydration synthesis d aromatization 26 The specific shape of a protein determines its function a false b true 27 In a feedback loop, the integrating center sends information to the a brain region b sensor c effector d thermostat 28 The base that is NOT found in RNA is a uracil b thymine c guanine d cytosine 29 The substrate binds to the ___ of the enzyme a neutral site b active site c acidic site d allosteric site 30 The addition of phosphate groups to a particular molecule is catalyzed by a phosphates b kinases c isomerases d transminases 31 The type of bond found in sodium chloride is a(n) a polar covalent bond b hydrogen bond c nonpolar covalent bond d ionic bond 32 How are the phospholipids arranged to form the plasma membrane? a single layer with hydrophilic heads outward b double layer with hydrophobic tails facing inward toward eachother c double layer with phospholipids on the outside and proteins on the inside d double layer with hydrophilic heads facing inward toward eachother 33 Hydrophilic molecules can move unaided into and out of cells regardless of size a False b true 34 A blood pH of 7.6 indicated a Alkalosis b the normal physiological range c effective buffering by the bicarbonate acid system d acidosis 35 Sucrose is a disaccharide that is composed of ___ and ___ a Glucose; fructose b glucose; galactose c glucose; glucose 36 The process by which cells secrete cellular products into the extracellular environment is a phagocytosis b pinocytosis c endocytosis d exocytosis 37 The primary buffer in the blood is the ___ buffer a ammonia b bicarbonate c hydronium d phosphate 38 Atoms sharing a pair of electrons from covalent bonds a false b true 39 An example of a monosaccharide is a maltose b glucose c glycogen d sucrose 40 Regarding acids and bases a acids will accept hydrogen ions in a solution b bases will decrease the pH of a solution c acids will increase the pH of a solution d Bases will accept hydrogen ions in a solution 41 A catalyst's main characteristic is that it increases the ___ of the reaction a Rate b temp. c pH d size 42 In an acidic solution, a OH- ion concentration is greater than the H+ ion concentration b the OH- ion concentration is less than the H+ ion concentration c H+ ion concentration is less than the OH- ions concentration only if the solution is buffered 43 Cells lacking lysosomes would be unable to undergo apoptosis a false b true 44 A reaction which uses water to break bonds between molecules would be catalyzed by a enzyme a hydrolase b synthase c isomerase 45 weakest bond type a nonpolar covalent bond b polar covalent bond c ionic bond d hydrogen bond 46 ATP is the most common purine-containing nucleotide. Its common function is as a(n) a neurotransmitter b energy carrier c coenzymes d hormones

1

The level of protein structure primarily involved in determining enzyme activity is the

a

Tertiary enzyme

b

secondary enzyme

c

primary enzyme

d

quaternary enzyme

2

Regulation of a metabolic pathway by the final product of the pathway is termed

a

Both end-product inhibition and negative feedback

b

end-product inhibition

c

allosteric inhibition

d

negative feedback

3

Enzymes that remove hydrogen atoms from their substrates are referred to as

a

catalases

b

hydrolases

c

peroxidases

d

dehydrogenases

4

What enzyme breaks the hydrogen bonds between the bases of DNA in preparation for replication?

a

rRNA

b

dehysrogenases

c

DNA helicase

5

Bonds that are formed between oxygen and hydrogen atoms within water molecules are called

a

nonpolar covalent bonds

b

polar covalent bonds

c

ionic bonds

d

hydrogen bonds

6

A codon codes for

a

mRNA

b

fatty acid

c

amino acid

d

carbs

7

The addition of water with the proper enzymes to a molecule is called

a

dehydration synthesis

b

combustion

c

condensation

d

hydrolysis

8

Negative feedback results in a response that opposes the original deviation from normal

a

false

b

true

9

Hydrogen bonds form between the partially charged atoms of 2 polar molecules, such as the slightly positively charged hydrogen atom of one water molecule and the slightly negatively charged oxygen atom of another.

a

false

b

true

10

Glucose and lactose are structural isomers that can be used immediately by cells to create ATP

a

False

b

true

11

Molecules that contain carbon and hydrogen atoms are

a

Organic molecules

b

inorganic molecules

c

molecules

12

Chromatin that is active in genetic transcription is called

a

heterochromatin

b

euchromatin

c

homochromatic

d

embryonic chromatin

13

Protein synthesis utilizes ___ as the template copy from DNA

a

rRNA

b

mRNA

c

tRNA

14

A chemical reaction rate can be increased by either _ the temperature or _ the activation energy

a

Increasing; decreasing

b

increasing; increasing

c

decreasing; decreasing

d

decreasing; increasing

15

In DNA, cytosine forms a complementary base pair with adenine

a

False

b

true

16

When an atom loses one or more electrons, it becomes

a

Positively charged

b

an isotope

c

negatively charged

d

an anion

17

The term proteome refers to all the genes in a particular individual

a

False

b

true

18

How many single bonds can a carbon atom form if it is double-bonded to an oxygen atom?

a

2

b

1

c

3

d

4

e

5

19

Molecules with the same atoms, in the same sequence, but arranged differently in space are called

a

structural isomer

b

functional groups

c

aromatic molecules

d

stereoisomers

20

RNA that has the function of bringing amino acids to the ribosome during translation is called ___ RNA

a

ribosomal

b

messenger

c

nuclear

d

transfer

21

The process of gene expression occurs as genetic

a

Transcription and genetic translation

b

translation and genetic degradation

c

transcription and genetic transduction

d

transduction and genetic degradation

22

What holds a protein in its tertiary structure?

a

Both weak chemical bonds between widely spaced amino acids and disulfide bonds between sulfur groups on cysteines are correct

b

hyrogen bonds between nearby amino acids

c

disulfide bonds between sulfur groups on cysteines

d

weak chemical bonds between widely spaced amino acids

23

The conversion of glucose to galactose would be catalyzed by an isomerase enzyme

a

false

b

true

24

An atom with 5 protons, 5 neutrons, and 6 electrons would have a net charge of

a

+1

b

-1

c

-2

d

+2

25

Peptide bonds are formed by the process of

a

ketosis

b

hydrolysis

c

dehydration synthesis

d

aromatization

26

The specific shape of a protein determines its function

a

false

b

true

27

In a feedback loop, the integrating center sends information to the

a

brain region

b

sensor

c

effector

d

thermostat

28

The base that is NOT found in RNA is

a

uracil

b

thymine

c

guanine

d

cytosine

29

The substrate binds to the ___ of the enzyme

a

neutral site

b

active site

c

acidic site

d

allosteric site

30

The addition of phosphate groups to a particular molecule is catalyzed by

a

phosphates

b

kinases

c

isomerases

d

transminases

31

The type of bond found in sodium chloride is a(n)

a

polar covalent bond

b

hydrogen bond

c

nonpolar covalent bond

d

ionic bond

32

How are the phospholipids arranged to form the plasma membrane?

a

single layer with hydrophilic heads outward

b

double layer with hydrophobic tails facing inward toward eachother

c

double layer with phospholipids on the outside and proteins on the inside

d

double layer with hydrophilic heads facing inward toward eachother

33

Hydrophilic molecules can move unaided into and out of cells regardless of size

a

False

b

true

34

A blood pH of 7.6 indicated

a

Alkalosis

b

the normal physiological range

c

effective buffering by the bicarbonate acid system

d

acidosis

35

Sucrose is a disaccharide that is composed of _ and _

a

Glucose; fructose

b

glucose; galactose

c

glucose; glucose

36

The process by which cells secrete cellular products into the extracellular environment is

a

phagocytosis

b

pinocytosis

c

endocytosis

d

exocytosis

37

The primary buffer in the blood is the ___ buffer

a

ammonia

b

bicarbonate

c

hydronium

d

phosphate

38

Atoms sharing a pair of electrons from covalent bonds

a

false

b

true

39

An example of a monosaccharide is

a

maltose

b

glucose

c

glycogen

d

sucrose

40

Regarding acids and bases

a

acids will accept hydrogen ions in a solution

b

bases will decrease the pH of a solution

c

acids will increase the pH of a solution

d

Bases will accept hydrogen ions in a solution

41

A catalyst's main characteristic is that it increases the ___ of the reaction

a

Rate

b

temp.

c

pH

d

size

42

In an acidic solution,

a

OH- ion concentration is greater than the H+ ion concentration

b

the OH- ion concentration is less than the H+ ion concentration

c

H+ ion concentration is less than the OH- ions concentration only if the solution is buffered

43

Cells lacking lysosomes would be unable to undergo apoptosis

a

false

b

true

44

A reaction which uses water to break bonds between molecules would be catalyzed by a enzyme

a

hydrolase

b

synthase

c

isomerase

45

weakest bond type

a

nonpolar covalent bond

b

polar covalent bond

c

ionic bond

d

hydrogen bond

46

ATP is the most common purine-containing nucleotide. Its common function is as a(n)

a

neurotransmitter

b

energy carrier

c

coenzymes

d

hormones

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exam 1Online version

by a. G.

The level of protein structure primarily involved in determining enzyme activity is the

Regulation of a metabolic pathway by the final product of the pathway is termed

Enzymes that remove hydrogen atoms from their substrates are referred to as

What enzyme breaks the hydrogen bonds between the bases of DNA in preparation for replication?

Bonds that are formed between oxygen and hydrogen atoms within water molecules are called

A codon codes for

The addition of water with the proper enzymes to a molecule is called

Negative feedback results in a response that opposes the original deviation from normal

Hydrogen bonds form between the partially charged atoms of 2 polar molecules, such as the slightly positively charged hydrogen atom of one water molecule and the slightly negatively charged oxygen atom of another.

Glucose and lactose are structural isomers that can be used immediately by cells to create ATP

Molecules that contain carbon and hydrogen atoms are

Chromatin that is active in genetic transcription is called

Protein synthesis utilizes ___ as the template copy from DNA

A chemical reaction rate can be increased by either ___ the temperature or ___ the activation energy

In DNA, cytosine forms a complementary base pair with adenine

When an atom loses one or more electrons, it becomes

The term proteome refers to all the genes in a particular individual

How many single bonds can a carbon atom form if it is double-bonded to an oxygen atom?

Molecules with the same atoms, in the same sequence, but arranged differently in space are called

RNA that has the function of bringing amino acids to the ribosome during translation is called ___ RNA

The process of gene expression occurs as genetic

What holds a protein in its tertiary structure?

The conversion of glucose to galactose would be catalyzed by an isomerase enzyme

An atom with 5 protons, 5 neutrons, and 6 electrons would have a net charge of

Peptide bonds are formed by the process of

The specific shape of a protein determines its function

In a feedback loop, the integrating center sends information to the

The base that is NOT found in RNA is

The substrate binds to the ___ of the enzyme

The addition of phosphate groups to a particular molecule is catalyzed by

The type of bond found in sodium chloride is a(n)

How are the phospholipids arranged to form the plasma membrane?

Hydrophilic molecules can move unaided into and out of cells regardless of size

A blood pH of 7.6 indicated

Sucrose is a disaccharide that is composed of ___ and ___

The process by which cells secrete cellular products into the extracellular environment is

The primary buffer in the blood is the ___ buffer

Atoms sharing a pair of electrons from covalent bonds

An example of a monosaccharide is

Regarding acids and bases

A catalyst's main characteristic is that it increases the ___ of the reaction

In an acidic solution,

Cells lacking lysosomes would be unable to undergo apoptosis

A reaction which uses water to break bonds between molecules would be catalyzed by a enzyme

weakest bond type

ATP is the most common purine-containing nucleotide. Its common function is as a(n)

Molecules that contain carbon and hydrogen atoms are

A chemical reaction rate can be increased by either _ the temperature or _ the activation energy

The term proteome refers to all the genes in a particular individual

Sucrose is a disaccharide that is composed of _ and _

A reaction which uses water to break bonds between molecules would be catalyzed by a enzyme