Which of the following statements about the polymerase chain reaction (PCR) is
false?
A) DNA amplified by PCR can be cloned.
B) DNA is amplified at many points within a cellular genome.
C) Newly synthesized DNA must be heat-denatured before the next round of DNA
synthesis begins.
D) The boundaries of the amplified DNA segment are determined by the synthetic
oligonucleotides used to prime DNA synthesis.
E) The technique is sufficiently sensitive that DNA sequences can be amplified from a
single animal or human hair.
,Give this one a try later!
B) DNA is amplified at many points within a cellular genome.
In one catalytic cycle, the Na+/K+ ATPase transporter transports:
A) 2 Na+ out, 3 K+ in, and converts 1 ATP to ADP + Pi.
B) 3 Na+ out, 2 K+ in, and converts 1 ATP to ADP + Pi.
C) 3 Na+ in, 2 K+ out, and converts 1 ATP to ADP + Pi.
D) 1 Na+ out, 1 K+ in, and converts 1 ATP to ADP + Pi.
E) 2 Na+ out, 3 K+ in, and converts 1 ADP + Pi to ATP.
Give this one a try later!
B) 3 Na+ out, 2 K+ in, and converts 1 ATP to ADP + Pi.
Which of the following is not true of sterols?
A) Cholesterol is a sterol that is commonly found in mammals.
B) They are commonly found in bacterial membranes.
C) They are more common in plasma membranes than in intracellular membranes
(mitochondria, lysosomes, etc.).
D) They are precursors of steroid hormones.
E) They have a structure that includes four fused rings.
Give this one a try later!
B) They are commonly found in bacterial membranes.
,Consider the transport of K+ from the blood (where its concentration is about 4 mM)
into an erythrocyte that contains 150 mM K+. The transmembrane potential is about 60
mV, inside negative relative to outside. The free-energy change for this transport
process is: (These values may be of use to you: R = 8.315 J/mol.K; T = 298 K; 9 (Faraday
constant) = 96,480 J/V; N = 6.022 1023/mol.)
A) about 5 J/mol.
B) about 15 J/mol.
C) about 5 kJ/mol.
D) about 15 kJ/mol.
E) impossible to calculate with the information given.
Give this one a try later!
D) about 15 kJ/mol.
Ubiquitin is a:
A) component of the electron transport system.
B) protease.
C) protein kinase.
D) protein phosphorylase.
E) protein that tags another protein for proteolysis.
Give this one a try later!
E) protein that tags another protein for proteolysis.
Steroid hormone response elements (HREs) are __________ , which, when bound to
_____________, alter gene expression at the level of ________________.
, A) intron sequences; activated hormone receptor; translation
B) nuclear proteins; hormone; transcription
C) plasma membrane proteins; hormone; transcription
D) sequences in DNA; receptor-hormone complex; replication
E) sequences in DNA; receptor-hormone complex; transcription
Give this one a try later!
E) sequences in DNA; receptor-hormone complex; transcription
Which of these statements about facilitated diffusion across a membrane is true?
A) A specific membrane protein lowers the activation energy for movement of the
solute through the membrane.
B) It can increase the size of a transmembrane concentration gradient of the diffusing
solute.
C) It is impeded by the solubility of the transported solute in the nonpolar interior of
the lipid bilayer.
D) It is responsible for the transport of gases such as O2, N2, and CH4 across
biological membranes.
E) The rate is not saturable by the transported substrate.
Give this one a try later!
A) A specific membrane protein lowers the activation energy for movement
of the solute through the membrane.
Tay-Sachs disease is the result of a genetic defect in the metabolism of:
A) gangliosides.
B) phosphatidyl ethanolamine.
C) sterols.
false?
A) DNA amplified by PCR can be cloned.
B) DNA is amplified at many points within a cellular genome.
C) Newly synthesized DNA must be heat-denatured before the next round of DNA
synthesis begins.
D) The boundaries of the amplified DNA segment are determined by the synthetic
oligonucleotides used to prime DNA synthesis.
E) The technique is sufficiently sensitive that DNA sequences can be amplified from a
single animal or human hair.
,Give this one a try later!
B) DNA is amplified at many points within a cellular genome.
In one catalytic cycle, the Na+/K+ ATPase transporter transports:
A) 2 Na+ out, 3 K+ in, and converts 1 ATP to ADP + Pi.
B) 3 Na+ out, 2 K+ in, and converts 1 ATP to ADP + Pi.
C) 3 Na+ in, 2 K+ out, and converts 1 ATP to ADP + Pi.
D) 1 Na+ out, 1 K+ in, and converts 1 ATP to ADP + Pi.
E) 2 Na+ out, 3 K+ in, and converts 1 ADP + Pi to ATP.
Give this one a try later!
B) 3 Na+ out, 2 K+ in, and converts 1 ATP to ADP + Pi.
Which of the following is not true of sterols?
A) Cholesterol is a sterol that is commonly found in mammals.
B) They are commonly found in bacterial membranes.
C) They are more common in plasma membranes than in intracellular membranes
(mitochondria, lysosomes, etc.).
D) They are precursors of steroid hormones.
E) They have a structure that includes four fused rings.
Give this one a try later!
B) They are commonly found in bacterial membranes.
,Consider the transport of K+ from the blood (where its concentration is about 4 mM)
into an erythrocyte that contains 150 mM K+. The transmembrane potential is about 60
mV, inside negative relative to outside. The free-energy change for this transport
process is: (These values may be of use to you: R = 8.315 J/mol.K; T = 298 K; 9 (Faraday
constant) = 96,480 J/V; N = 6.022 1023/mol.)
A) about 5 J/mol.
B) about 15 J/mol.
C) about 5 kJ/mol.
D) about 15 kJ/mol.
E) impossible to calculate with the information given.
Give this one a try later!
D) about 15 kJ/mol.
Ubiquitin is a:
A) component of the electron transport system.
B) protease.
C) protein kinase.
D) protein phosphorylase.
E) protein that tags another protein for proteolysis.
Give this one a try later!
E) protein that tags another protein for proteolysis.
Steroid hormone response elements (HREs) are __________ , which, when bound to
_____________, alter gene expression at the level of ________________.
, A) intron sequences; activated hormone receptor; translation
B) nuclear proteins; hormone; transcription
C) plasma membrane proteins; hormone; transcription
D) sequences in DNA; receptor-hormone complex; replication
E) sequences in DNA; receptor-hormone complex; transcription
Give this one a try later!
E) sequences in DNA; receptor-hormone complex; transcription
Which of these statements about facilitated diffusion across a membrane is true?
A) A specific membrane protein lowers the activation energy for movement of the
solute through the membrane.
B) It can increase the size of a transmembrane concentration gradient of the diffusing
solute.
C) It is impeded by the solubility of the transported solute in the nonpolar interior of
the lipid bilayer.
D) It is responsible for the transport of gases such as O2, N2, and CH4 across
biological membranes.
E) The rate is not saturable by the transported substrate.
Give this one a try later!
A) A specific membrane protein lowers the activation energy for movement
of the solute through the membrane.
Tay-Sachs disease is the result of a genetic defect in the metabolism of:
A) gangliosides.
B) phosphatidyl ethanolamine.
C) sterols.
