biochemistry

Hannah Angelique Losaria · 100問 · 2年前

通報

問題一覧

this organelle is located near the smooth ER and is involved in protein seretion and modification

golgi apparatus

these are membrane encolsed sacs which contain enzymes that degrade proteins and nucleic acids

lysosomes

which of the following organelles is found in both prokaryotes and eukaryotes

ribosomes

the following are features of biological membranes, except

glycolipids are the major class of lipids in membrane

which of the following does not correcctly describe the membrane lipids

gangliosides are the simplest glycolipids

which of the following correctly differentiates pumps and channels

pumps transport molecules in an uphill direction, while channel transports molecules in a downhill direction

which of the following carbohydrates cannot be hydrolized to simpler compounds

monosaccharides

what is the stored form of glucose in the animals

glycogen

it is the simplest monosaccharide

glyceraldehyde

sucrose is made up of which two sugars?

glucose + fructose

glucose and galactose are epimers at

carbon 4

which of the following is a polysaccharide

cellulose

which of the following choices are examples of anomers

a-d-glucose vs b-d-glucose

iodine reacts with starch to form a deep blue coloration due to the presence of

amylose

general test for carbohydrates

molisch test

test for pentoses

bial's test

hormone that lowers blood glucose levels

insulin

this is a condition in which the pancreas fails to secrete insulin

diabetes mellitus

which of the following is/are true regardng isomerism in sugar

a dextrorotatory sugar rotates the plane polarized light to the rright

a glycosaminoglycan that is injected through the joint for the relief of osteoarthritis

hyaluroic acid

which of the following serves as the major storage form of fatty acids

triglycerides

these are esers of long chain fatty acids with long chain monohydric alcohols

waxes

these are known as nuritionally essential fatty acids for humans

linoleic acid and alpha-linoleic acids

which of the following is not a hydrolyzable lipid?

eicosanoids

what is the major sterol found in fungi

ergosterol

which of the following fatty acids has 16 carbon atoms

palmitic

all of the followig unsaturated fatty acids contain 18 carbbon atoms, except for

cervonic acid

eicosanoids are derived from ________ carbon polyunsaturated fatty acids

squalene, an intermediate in the biosynthesis of cholesterol is classified as

triterpene

what lipid soluble compoundis essential for vision and epithelial cell growh?

retinol

which of the following tests indicates the presence of glycerol?

acrolein

this is the precursor of all steroids synthesized inside the body

cholesterol

these are essential fatty acid derivatives that mediate inflammation, pain, blood coagulaton, annnd reproduction

prostaglandins

when compared with saturated fatty acids, unsaturated fatty acids contain _______ in its structure

double bonds

which of the following fatty acids is the most susceptible to auto-oxidation?

linolenic acid

these are the bacterial metabollites of cellulose in the ruminants and other herbivors

short chain fatty acids

long cain fatty acids gain access to the b-oxidation system of enzymes in the inner mitochondrial membrane via the ___________ transporter

carnitine

fumarase

lyase

nucleoside monophosphate kinase

transferase

which amino acid contains an imidazole side chain

histidine

amino acid that cannot be synthesized by the body are called

essential

all of the following are connsidered essential amino acids, except

asparagine

cysteine and methionine

sulfur containing

tyrosine and phenylalanine

aromatic

alanine and valine

alipathic

all of the given are strictly glucogenic amino acids, except

phenylalanine

which chemical bond joins amino acids together in a protein molecule

peptide

a-helix and b-strand are examples of ________structure of proteins

secondary

what level of organization is present in hemoglobin

quaternary

this refers to the disruption of a protein's native conformation without destroying it

denaturation

the protein portion of enzyme is called

apoenzyme

which of the 20 common amino acids is the simplest

glycine

which of the following amino acids is not a primary amine

proline

most amino acid in nature exists in their

l-isomer form

what is the active form of zymogen-trypsinogen

trypsin

which of the following is the cofactor of the enzyme carbonic anhydrase

zinc

which vitamin precursor is not correctly matched to its derivative enzyme

vit b3: fad

which of the following is the simplest protein

albumin

fibrinogen

defensive

elastin

structural

actin

contractile

the test is used to detect amino acid tyrosine

millon

what are the functional groups present in amino acids I. carboxylic acid II. amino III. ketone

I, II

this amino acid is the precursor of catecholamines suc as epi and NE

tyrosine

all of the following amino acids undergo transamination, except I. lysine II. proline III. threonine IV. hydroxyproline

I, II, III, IV

heme is a/an _______

prosthetic group

this is where the enzymatic digestion of protein begins

mouth

which neutrophilic enzyme hydrolyzes the bacterial cell wall

lysozome

what type of amino acids are glutamate and aspartate

acidic

ecause of the physiological roles of carbon dioxide and bicarbonate ions, speed is of the essence for this enzyme

carbonic anhydrase

what is the composition of a nucleotide? I. sugar II. nitrogenous base III. phosphate

I, II, III

DNA is primarily found in the I. cyytosol II. nucleus III.mitochondria IV. ribosomes

II, III

which bond connects a nitrogenous base and sugar

glycosidic

all of the following are pyrimidal bases, except

guanine

it prevents premature reannealing of double stranded DNA

single strand binding proteins

which eukaryotic dna polymerase is responsible for the elongation of the leading strand

pol-epsilon

the most stable and most common form of dna

b- dna

the type of rna which serves as a template on which specific sequence of amino acids is polymerized to form a specific protein molecule

mrna

the mode in which dna reproduces itself, such that one strand comes from parent dna and the other strand is newly formed

semicoservative replication

which of the following is not a characteristic of DNA synthesis

occurs at the m phase of the cell cycle

the strand that is being copied in the direction away from the replication fork, and is synthesized discontinuously, with small fragments of dna being copied near the replication fork

lagging strand

if 20% of a nitrogenous base in the sample of double stranded dna is guanine, what percentage of the nitrogenous bases is adenine

on the lagging strand, the dna is synthesized in short, discontinuous stretches called:

okazaki fragments

which direction does genetic information flow during gene expression

dna- rna- protein

a post transcriptional modification which involves the addition of 7-methylguanosine at the 5 end of the mrna

caping

an amino acid may be specified by more than one codon, so the code is described as ___________

degenerate

which of the followin enzymes is involed in the removal of primers

dna polymerase I

a type of genetic mutation that causes an alteration in the dna resulting in a different amino acid

missense

a type of point mutation, wherein cytosine is replaced by thymine

transition

which of the following statements best describe the dna

the sugar moiety in dna is 2-deoxyribose

the following statements crrectly describes rna, except

it provides a template for dna replication

which of the following antineoplastic agents inhibits topoisomerase I

irinotecan

what are the ends of the chromosome called

telomere

in what organelle do the first phases of protein synthesis occur

nucleus

which stage of translation involves the binding of ribosome to an mrna transcript?

initiation

how does the cell regulate dna replication and mrna transcription

compartmentalization

which of the following is not aa major substrate for gluconeogenesis

glucose

what is the procedure for converting liver glycogen into blood glucose

glycogenolysis

which of the following pathways does not occur in the cytosol

citric acid cycle

100

glycolysis

phophofructokinase

gastro

gastro

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gastro m

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37問 • 1年前

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