BIO TEST BANK FOR 2021 DOCTORES
WRITTEN BY MUHAMMAD ALJAHALIN
,1.all of the following properties makes water an essential substance for life on earth except:
A .solvent
B. cohesion
c. expansion above 10 c degree
d. surface tension
e. specific heat
answer C
2. which of the following properties is shared by starch & cellulose?
a. polymer of glucose
b. digested by humans
c. none of the option is correct
d. structural carbohydrates
e. branched carbohydrates
answer A
3. the four main categories of macromolecules in a cell are :
a. proteins , nucleic acids , carbohydrates and lipids
b. monosaccharides , lipids , polysaccharides and proteins
c. proteins, DNA , RNA and steroids
d. nucleic acids , carbohydrates , monosaccharides and proteins
e. RNA, DNA , proteins and carbohydrates
answer A
4. how does DNA differ from RNA ?
a. they contain different sugars
b. all of the options are correct
c. none of the option is correct
d. one of their nitrogenous bases is different
e. DNA is larger
ANWER /b
,5. the tertiary structure of proteins refers to :
a. folding due to interactions between R groups of the amino acids
b. the weak interaction of two or more polypeptides
c. coiling due to hydrogen bonding between atoms of backbone
d. the sequence of amino acids
e. the alpha helix and beta pleated sheets
Answer: A
6,phospholipids function in animal cells as :
a. enzymes
b. vertebrate hormones
c. a component of triglycerides
d. energy storage molecules
e. a component of the membranes
Answer: E
7.which of the following is not a polymer
a. collagen
b. starch
c. phospholipid
d. cellulose
E. RNA
Answer: C
8. thylakoids , DNA and ribosomes are all components found in
a. nuclei
b. mitochondria
c. vacuoles
d. lysosomes
e. chloroplasts
Answer: E
, 9. large numbers of ribosomes are present in cells that specialize in producing which of the following
molecules ?
a. proteins
b. cellulose
c. lipides
d. nucleic acids
e. glycogen
Answer: A
10. The most likely pathway taken by a newly synthesized protein that will be secreted by a cell is to go
from ER to Golgi, then from Golgi in Vesicles to fuse with plasma membrane
A. true
b. false
Answer: A
11. the structural level of a protein least affected by disruption in hydrogen bonding is the :
a. all are equally affected
b. secondary
c. primary
d. quaternary
e. tertiary
Answer: C
12. the monomers of nucleic acids are
a. pyrimidine
b. nucleoside monophosphate
c. nucleotides
d. purine
e. nucleoside monophosphate or nucleotides
Answer: e
13. chromosomes are a complex of proteins and DNA or RNA
a. true
WRITTEN BY MUHAMMAD ALJAHALIN
,1.all of the following properties makes water an essential substance for life on earth except:
A .solvent
B. cohesion
c. expansion above 10 c degree
d. surface tension
e. specific heat
answer C
2. which of the following properties is shared by starch & cellulose?
a. polymer of glucose
b. digested by humans
c. none of the option is correct
d. structural carbohydrates
e. branched carbohydrates
answer A
3. the four main categories of macromolecules in a cell are :
a. proteins , nucleic acids , carbohydrates and lipids
b. monosaccharides , lipids , polysaccharides and proteins
c. proteins, DNA , RNA and steroids
d. nucleic acids , carbohydrates , monosaccharides and proteins
e. RNA, DNA , proteins and carbohydrates
answer A
4. how does DNA differ from RNA ?
a. they contain different sugars
b. all of the options are correct
c. none of the option is correct
d. one of their nitrogenous bases is different
e. DNA is larger
ANWER /b
,5. the tertiary structure of proteins refers to :
a. folding due to interactions between R groups of the amino acids
b. the weak interaction of two or more polypeptides
c. coiling due to hydrogen bonding between atoms of backbone
d. the sequence of amino acids
e. the alpha helix and beta pleated sheets
Answer: A
6,phospholipids function in animal cells as :
a. enzymes
b. vertebrate hormones
c. a component of triglycerides
d. energy storage molecules
e. a component of the membranes
Answer: E
7.which of the following is not a polymer
a. collagen
b. starch
c. phospholipid
d. cellulose
E. RNA
Answer: C
8. thylakoids , DNA and ribosomes are all components found in
a. nuclei
b. mitochondria
c. vacuoles
d. lysosomes
e. chloroplasts
Answer: E
, 9. large numbers of ribosomes are present in cells that specialize in producing which of the following
molecules ?
a. proteins
b. cellulose
c. lipides
d. nucleic acids
e. glycogen
Answer: A
10. The most likely pathway taken by a newly synthesized protein that will be secreted by a cell is to go
from ER to Golgi, then from Golgi in Vesicles to fuse with plasma membrane
A. true
b. false
Answer: A
11. the structural level of a protein least affected by disruption in hydrogen bonding is the :
a. all are equally affected
b. secondary
c. primary
d. quaternary
e. tertiary
Answer: C
12. the monomers of nucleic acids are
a. pyrimidine
b. nucleoside monophosphate
c. nucleotides
d. purine
e. nucleoside monophosphate or nucleotides
Answer: e
13. chromosomes are a complex of proteins and DNA or RNA
a. true
