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Biochem > multiple choice > Flashcards

multiple choice Flashcards

1
Q

Which compound would you expect to find in greater amoiunts in the cell membrane eof a fish that lived in very cold watter versus a fish that lived in warmer water

A

cholesterol

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2
Q

if a cell has a higher concentration of salt outside of the cell than inside what will happen

A

water will move out of the cell and the cell will shrink

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3
Q

in what type of inhibation does the inhibitor bind to an enzyme at a site other than the active site

A

noncompetitive inhibation

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4
Q

according to the induced fit model how does an enzyme accommodate its substrate

A

the enzyme changes its shape

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5
Q

what statement about startch is true about its linkages

A

its a chain of alpha glucose molecules joined by a1-4 glydocidic bonds.

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6
Q

the four major types of chemical reactions that are common in. biological processes are

A

dehydration, synthesis, hydrolysis, neutralization

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7
Q

what statement best describes a radioisotope

A

an isotope that is unstable and breaks down into smaller atoms releasing energy

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8
Q

which is the most stable part of the cytoskeleton

A

intermidiate filaments

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9
Q

what happens to a strong acid in solution

A

it completly ionizes in solution to produce many H ions

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10
Q

Why are 8 out of 20 amino acids considered to be essential for humans

A

they can be obtained only in the foods we eat

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11
Q

what organelle is associated with the production of ribosomes

A

nucleous

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12
Q

which factor will increase with the fluidity of lipid bilayers

A

increasing the length of the fatty acids

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13
Q

Which structure is a part of the endomembrane system

A

nucleous

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14
Q

what is the forces of attraction between hydrocarbon

A

London dispersion

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15
Q

What type of molecule contaains the hydroxyl functional group

A

nucleic acids

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16
Q

what is the function of ribosomes

A

ribosomes translate RNA into polypeptide chains

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17
Q

what is an example of purine

A

adenine guanine

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18
Q

what is denaturation

A

may occur due to excess hydronium ions

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19
Q

what are the charecteristics of a hydrogen bond

A

they are weker then covalent, responsible for the suraface tension properties of water, they are responsible for relativley high boiling point of water

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20
Q

what is a prosthetic group

A

a non protien group that binds to a polypeptide to make it into a functional protien

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21
Q

increasing the distace between molecules results in what change to the intermolecular force

A

decrease

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22
Q

which 2 monosachrides make up sucrose

A

glucose and fructose

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23
Q

how does cellulose link

A

B1,4 gydocidic bonds

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24
Q

omega 3 or omega 6 is the term that refers to which type of molecule

A

fatty acid

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25
Q

compared to saturated fats unsaturated fars contain less…

A

hydrogen

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26
Q

which molecules contain nitrogen

A

chitin

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27
Q

what is a charecteristic about functional groups

A

they influence the physical properties of the molecule

28
Q

the function of glycogen is to

A

keep glucose available for humans

29
Q

what fatty acids do solid fats such as butter and lard contain

A

saturated fatty acids

30
Q

what are protiens polymers of

A

amino acid monomers

31
Q

a molecule such as a amino acid that has one end that can donate a hydrogen ion and one end can accept is known as a

A

amphiprotic

32
Q

which carbon has a different molecule attatchment depeneing on weather it is ribose sugar or deoxyribose

A

2

33
Q

compared to saturated fats unsaturated fats contain less,,,

A

hydrogen

33
Q

what substances are always produced in a neutralization reaction

A

water and salt

33
Q

in term maintaining the shape of a molecule the strongest binds involve

A

covalent

34
Q

what type of biomolecule is gycerol found in

A

lipids

35
Q

what functional grouos are acidic

A

carboxyl, phosphate

36
Q

what monosachrides make up lactose

A

galactose b glucose

37
Q

waxes contain what functional group

A

ester

38
Q

sulfhydryl group is most simalar to a

A

hydroxyl

39
Q

cholesterol is an example of what type of lipid

A

sterol

40
Q

the function of cellulose is

A

build structural cell walls in plants

41
Q

which organelle attatches to protiens

A

golgi body

42
Q

what role does the mitochondria play in the cell

A

cellular respiration

43
Q

what type of plastid is colorless and contains startch

A

amyloplast

44
Q

which statement about plastids is correct

A

chloroplasts are a common type of plastid in eukaryotic plant cells

45
Q

which part of plant cells contains microfillaments

A

cytoskeleton

46
Q

which part of plant cell contains microfilaments

A

cytoskeleton

47
Q

subunits of ribosomes are assembled in

A

nucleous

48
Q

endomembrane system includes the

A

plasma membrane, nucleous, er, vesciles, and golgibodies

49
Q

the enzyme catalyste are found in the ____ and used to convert hydrogen peroxide into water and oxegyn

A

peroxisomes

50
Q

once and polypeptides chains are assembles they enter the ___ and are put into final form

A

rough ER

51
Q

ECM is composed largely of ______ in animals

A

crabohydrates and protiens

52
Q

besides the nucleous which organells contain DNA

A

chloroplasts and mitochodria

53
Q

what is the purpose of cell junction

A

allow for chemical communication between cells and or the enviorment

54
Q

if a chemical a cell wall was exposed to destroyed , its smooth ER would result in

A

inactivation of toxins

55
Q

flagella is made of

A

microtubles

56
Q

what is the nuclear envelope

A

made up of 2 bilaywers, continous wuth the membrane of the ER, it contains pores that allow water and suspended substances to enter and exit the nucleous

57
Q

which organelle attatches carbphydrates to protiens

A

golgibody

58
Q

which organelle does not have a membarane

A

ribosome

59
Q

what are the function of ribosomes

A

translate RNA into polypeptide chains

60
Q

what is the extracellular matrix is a mix of _____ that suppourts the cell

A

protiens and carbs

61
Q

what is negative ffedback inhibition

A

a product acts as an allosteric inhibitor of an early enzyme in metabolic pathway

62
Q

glucose storage polysachride in animals

A

glycogen

63
Q

what are examples of pyrimidines

A

thymine, cytosine and uracial

64
Q

which organelles found in all cells

A

plasma membrane

65
Q

the key point of oxidization is that it is a prosess in which

A

there is a loss of elctrons

Biochem (2 decks)

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