BIOL practice
Multiple Choice Question:
1. Complete the following sentence: The head of a phospholipid is
hydrophilic because of its…
a) Carboxyl group
b) Aromatic ring
c) Fatty acid chain
d) Phosphate group
e) Hydrocarbon
2. Which of the following is TRUE of unsaturated fats?
a) They generally solidify at room temperature.
b) They have double bonds in their fatty acid chains.
c) They contain more hydrogen than do saturated fats having the
same number of carbon atoms.
d) They are the dominant species in butter and animal fat.
e) Their fatty acid chains adopt linear structures that pack together
readily.
3. What provides the necessary information to specify the three-
dimensional shape of a protein?
a) interaction with other polypeptides
b) interaction with encoding mRNA on the ribosome
c) the sequence and nature of amino acids
d) the peptide bonds
e) the specificity of base pairing
4. You load an agarose gel with samples containing equal numbers of DNA
fragments: 400bp, 650bp, and 2330bp. After running the gel for 60
minutes, the band of which sample will be the brightest?
a) 400bp
b) 650bp
c) 2330bp
d) there will be no difference
5. Which statement about the incorporation of a nucleotide into DNA is
TRUE?
a) When a nucleotide is incorporated into DNA there is loss of one
phosphate group to release inorganic phosphate.
, b) Before incorporation into DNA, nucleotids are in their tri-
phosphate form.
c) The nucleotide that has been incorporated into a DNA molecule
has three phosphate group
d) The sugar (ribose or deoxyribose) determines the number of
phosphate residues.
e) The incorporation of nucleotides into DNA requires energy from
ATP cleavage to ADP.
6. Which molecules transport electrons from the citric acid cycle to the
electron transport chain?
a) pyruvate and citric acid
b) NADH and FADH2
c) ATP and ADP
d) GTP and GDP
e) water and oxygen
7. Which of the following processes is overall exergonic?
a) Synthesis of ATP from ADP and phosphate
b) Protein synthesis
c) Glycolysis
d) Synthesis of glucose in photosynthesis
8. What is the role of DNA ligase in the replication of E. Coli DNA?
a) It separates the two strands of DNA ahead of the replication fork
b) It joins together the Okazaki fragments on the lagging strand
c) It catalyst the incorporation of DNA nucleotides into growing DNA
strand
d) It nicks the DNA to remove supercoiling stress ahead of the
replication fork
e) None of the answers are correct
9. Cell X has half as much DNA as cells Y, Z and W in a mitotically active
tissue. Cell X is mostly likely in
a) G1
b) G2
c) prophase
d) metaphase
, e) the middle of S phase
10. Which of the following statement about Oxidative Phosphorylation is
TRUE?
a) Electron from the electron transport chains are passed to ATP
synthase, which uses their energy to make ATP.
b) Protons (H+) move freely through the membrane protein complex
of the electron transport chain, creating the proton gradient
c) The electron transport chain produces a proton gradient across
the inner mitochondrial membrane
d) NADH and FADH2 are terminal electron acceptors in the electron
transport chain
e) Water is the terminal electron acceptor
11. Which is the final electron acceptor in the electron transport chain in
respiration?
a) ADP
b) ATP
c) NADH
d) Oxygen
e) Water
12. At which stage of mitosis do the chromosomes start to condense?
a) prophase
b) prometaphase
c) metaphase
d) anaphase
e) telophase
13. Which structure is found in all prokaryotes and eukaryotes?
a) chloroplast
b) mitochondrion
c) nucleus
d) cell wall
e) ribosome
14. Which of the following is NOT to be used in PCR?
a) thermostable DNA polymerase
b) DNA primers
Multiple Choice Question:
1. Complete the following sentence: The head of a phospholipid is
hydrophilic because of its…
a) Carboxyl group
b) Aromatic ring
c) Fatty acid chain
d) Phosphate group
e) Hydrocarbon
2. Which of the following is TRUE of unsaturated fats?
a) They generally solidify at room temperature.
b) They have double bonds in their fatty acid chains.
c) They contain more hydrogen than do saturated fats having the
same number of carbon atoms.
d) They are the dominant species in butter and animal fat.
e) Their fatty acid chains adopt linear structures that pack together
readily.
3. What provides the necessary information to specify the three-
dimensional shape of a protein?
a) interaction with other polypeptides
b) interaction with encoding mRNA on the ribosome
c) the sequence and nature of amino acids
d) the peptide bonds
e) the specificity of base pairing
4. You load an agarose gel with samples containing equal numbers of DNA
fragments: 400bp, 650bp, and 2330bp. After running the gel for 60
minutes, the band of which sample will be the brightest?
a) 400bp
b) 650bp
c) 2330bp
d) there will be no difference
5. Which statement about the incorporation of a nucleotide into DNA is
TRUE?
a) When a nucleotide is incorporated into DNA there is loss of one
phosphate group to release inorganic phosphate.
, b) Before incorporation into DNA, nucleotids are in their tri-
phosphate form.
c) The nucleotide that has been incorporated into a DNA molecule
has three phosphate group
d) The sugar (ribose or deoxyribose) determines the number of
phosphate residues.
e) The incorporation of nucleotides into DNA requires energy from
ATP cleavage to ADP.
6. Which molecules transport electrons from the citric acid cycle to the
electron transport chain?
a) pyruvate and citric acid
b) NADH and FADH2
c) ATP and ADP
d) GTP and GDP
e) water and oxygen
7. Which of the following processes is overall exergonic?
a) Synthesis of ATP from ADP and phosphate
b) Protein synthesis
c) Glycolysis
d) Synthesis of glucose in photosynthesis
8. What is the role of DNA ligase in the replication of E. Coli DNA?
a) It separates the two strands of DNA ahead of the replication fork
b) It joins together the Okazaki fragments on the lagging strand
c) It catalyst the incorporation of DNA nucleotides into growing DNA
strand
d) It nicks the DNA to remove supercoiling stress ahead of the
replication fork
e) None of the answers are correct
9. Cell X has half as much DNA as cells Y, Z and W in a mitotically active
tissue. Cell X is mostly likely in
a) G1
b) G2
c) prophase
d) metaphase
, e) the middle of S phase
10. Which of the following statement about Oxidative Phosphorylation is
TRUE?
a) Electron from the electron transport chains are passed to ATP
synthase, which uses their energy to make ATP.
b) Protons (H+) move freely through the membrane protein complex
of the electron transport chain, creating the proton gradient
c) The electron transport chain produces a proton gradient across
the inner mitochondrial membrane
d) NADH and FADH2 are terminal electron acceptors in the electron
transport chain
e) Water is the terminal electron acceptor
11. Which is the final electron acceptor in the electron transport chain in
respiration?
a) ADP
b) ATP
c) NADH
d) Oxygen
e) Water
12. At which stage of mitosis do the chromosomes start to condense?
a) prophase
b) prometaphase
c) metaphase
d) anaphase
e) telophase
13. Which structure is found in all prokaryotes and eukaryotes?
a) chloroplast
b) mitochondrion
c) nucleus
d) cell wall
e) ribosome
14. Which of the following is NOT to be used in PCR?
a) thermostable DNA polymerase
b) DNA primers
