Biology 1A03 Revision Exam Questions
Answered Correctly.
ATP is required in the transport of
-molecules to areas of lower concentrations.
-molecules to areas of higher concentrations.
-all molecules across the membrane.
-water molecules.
-molecules through all protein channels. - Answer -molecules to areas of higher
concentrations.
According to the endosymbiotic theory, what is the likely origin of mitochondria?
-non-photosynthetic chloroplasts
-anaerobic bacteria
-aerobic bacteria
-infolded cell membranes - Answer -aerobic bacteria
When a glucose molecule loses a hydrogen atom as the result of an oxidation-reduction
reaction, the molecule becomes
-Reduced
-Oxidized
-Oxidizing agent - Answer -Oxidized
The endosymbiotic theory is an attempt to explain the presence of the __________ in the
eukaryotic cell.
-Mitochondria and chloroplasts
-Ribosomes and the nucleus
-Mitochondria and the nucleus
,-An agent that reacts with NADH and oxidizes it to NAD+.
-An agent that closely mimics the structure of glucose but is not metabolized.
-An agent that binds to pyruvate and inactivates it.
-An agent that blocks the passage of electrons along the electron transport chain.
-An agent that reacts with oxygen and depletes its concentration in the cell. - Answer -An
agent that closely mimics the structure of glucose but is not metabolized.
To cross the cell membrane, water must
-squeeze between phospholipid molecules.
-pass through aquaporins.
-be transported together with another molecule at the same time.
-be transported at the expense of ATP. - Answer -pass through aquaporins.
Water passes quickly through cell membranes because
-it is a small, polar, charged molecule.
-water movement is tied to the hydrolysis of ATP.
-it moves through aquaporins in the membrane.
-it moves through hydrophobic channels.
-the bilayer is hydrophilic. - Answer -it moves through aquaporins in the membrane.
In order for a protein to be an integral membrane protein it would have to be which of the
following?
-Hydrophilic.
-Amphipathic.
-Completely covered with phospholipids.
-Exposed on only one surface of the membrane.
-Hydrophobic. - Answer -Amphipathic.
, -Blood or tissue type of the patient.
-Similarity of the drug molecule to the other molecules transported by the target cells
-Non-polarity of the drug molecule.
-Lipid composition of the target cells' plasma membrane.
-Lack of charge on the drug molecule.
-Non-polarity of the drug molecule. - Answer -Similarity of the drug molecule to the other
molecules transported by the target cells
Which of the choices below can be used to correctly begin the following sentence?
"__________________________ have a cell wall."
-All animal and plant cells, but not bacterial cells
-All cells
-All bacterial cells, but not animal and plant cells
-All plant and bacterial cells, but not animal cells - Answer -All plant and bacterial cells, but not
animal cells
In the DNA of certain bacterial cells, 16% of the nucleotides are adenine. What are the
percentages of the other nucleotides in the bacterial DNA?
-34% thymidine, 34% guanine, 16% cytosine
-34% thymidine, 16% guanine, 34% cytosine
-34% uracil, 16% guanine, 16% cytosine
-16% thymidine, 34% guanine, 34% cytosine - Answer -16% thymidine, 34% guanine, 34%
cytosine
If DNA is heated to 95°C, the bonds between complementary strands break, resulting in two
single strands of DNA. In this process, which bases will separate first?
-guanine and thymine
-adenine and cytosine
-guanine and cytosine
Answered Correctly.
ATP is required in the transport of
-molecules to areas of lower concentrations.
-molecules to areas of higher concentrations.
-all molecules across the membrane.
-water molecules.
-molecules through all protein channels. - Answer -molecules to areas of higher
concentrations.
According to the endosymbiotic theory, what is the likely origin of mitochondria?
-non-photosynthetic chloroplasts
-anaerobic bacteria
-aerobic bacteria
-infolded cell membranes - Answer -aerobic bacteria
When a glucose molecule loses a hydrogen atom as the result of an oxidation-reduction
reaction, the molecule becomes
-Reduced
-Oxidized
-Oxidizing agent - Answer -Oxidized
The endosymbiotic theory is an attempt to explain the presence of the __________ in the
eukaryotic cell.
-Mitochondria and chloroplasts
-Ribosomes and the nucleus
-Mitochondria and the nucleus
,-An agent that reacts with NADH and oxidizes it to NAD+.
-An agent that closely mimics the structure of glucose but is not metabolized.
-An agent that binds to pyruvate and inactivates it.
-An agent that blocks the passage of electrons along the electron transport chain.
-An agent that reacts with oxygen and depletes its concentration in the cell. - Answer -An
agent that closely mimics the structure of glucose but is not metabolized.
To cross the cell membrane, water must
-squeeze between phospholipid molecules.
-pass through aquaporins.
-be transported together with another molecule at the same time.
-be transported at the expense of ATP. - Answer -pass through aquaporins.
Water passes quickly through cell membranes because
-it is a small, polar, charged molecule.
-water movement is tied to the hydrolysis of ATP.
-it moves through aquaporins in the membrane.
-it moves through hydrophobic channels.
-the bilayer is hydrophilic. - Answer -it moves through aquaporins in the membrane.
In order for a protein to be an integral membrane protein it would have to be which of the
following?
-Hydrophilic.
-Amphipathic.
-Completely covered with phospholipids.
-Exposed on only one surface of the membrane.
-Hydrophobic. - Answer -Amphipathic.
, -Blood or tissue type of the patient.
-Similarity of the drug molecule to the other molecules transported by the target cells
-Non-polarity of the drug molecule.
-Lipid composition of the target cells' plasma membrane.
-Lack of charge on the drug molecule.
-Non-polarity of the drug molecule. - Answer -Similarity of the drug molecule to the other
molecules transported by the target cells
Which of the choices below can be used to correctly begin the following sentence?
"__________________________ have a cell wall."
-All animal and plant cells, but not bacterial cells
-All cells
-All bacterial cells, but not animal and plant cells
-All plant and bacterial cells, but not animal cells - Answer -All plant and bacterial cells, but not
animal cells
In the DNA of certain bacterial cells, 16% of the nucleotides are adenine. What are the
percentages of the other nucleotides in the bacterial DNA?
-34% thymidine, 34% guanine, 16% cytosine
-34% thymidine, 16% guanine, 34% cytosine
-34% uracil, 16% guanine, 16% cytosine
-16% thymidine, 34% guanine, 34% cytosine - Answer -16% thymidine, 34% guanine, 34%
cytosine
If DNA is heated to 95°C, the bonds between complementary strands break, resulting in two
single strands of DNA. In this process, which bases will separate first?
-guanine and thymine
-adenine and cytosine
-guanine and cytosine
