Brooker Biology Exam 5-7 test bank 105
complete solutions 100%.
Brooker Biology Exam 5-7 test bank 105
complete solutions 100%.
1. Which of the following organisms is likely to contain biomembranes?
A. plants
B. animals
C. prokaryotes
D. plants and animals
E. All living organisms contain biomembranes. - ANSWER E
2. Cellular membranes are
A. fluid.
B. solely composed of lipids.
C. composed of a single layer of amphipathic molecules.
D. selective to the transport of gases and small molecules only.
E. characteristic of eukaryotes, but not prokaryotes. - ANSWER A
3. Which of the following is the major lipid found in membranes?
A. steroids
B. cholesterol
C. triglycerides
D. phospholipids
E. saturated fatty acids - ANSWER D
4. Which of the following is NOT true of the plasma membrane?
A. It is composed of an extracellular and intracellular layer of phospholipids.
B. The extracellular and intracellular layers or leaflets are highly symmetrical.
,Brooker Biology Exam 5-7 test bank 105
complete solutions 100%.
C. The membrane contains peripheral proteins.
D. Integral proteins span through the membrane.
E. The membrane contains glycolipids and glycoproteins. - ANSWER B
5. Which of the following statements about plasma membranes is INCORRECT?
A. They are composed of phospholipids.
B. They have both integral and peripheral proteins.
C. They are relatively rigid structures.
D. They are composed of two leaflets of phospholipids.
E. They function to separate the extracellular and intracellular environment. - ANSWER B
6. Scientists unearth a Wooly Mammoth from the Siberian Ice Sheath and discover that a eukaryotic
"amoeba"-like cell is still alive. Which component of the cell membrane might contribute to maintaining
the fluidity of plasma membranes under freezing conditions?
A. peripheral proteins
B. high levels of long fatty acyl tails within the lipid bilayer
C. high levels of unsaturated fatty acyl tails within the lipid bilayer
D. absence of cholesterol
E. high levels of saturated fatty acyl tails within the lipid bilayer - ANSWER C
7. Which of the following statements is CORRECT about biomembranes?
A. The phospholipid tails interact with water.
B. The phospholipid head groups are repelled by water.
C. Electron microscopy indicates the membrane looks like train tracks with two light lines of lipids
separated by a dark line containing proteins.
D. The membrane is composed of two protein layers separated by a lipid layer.
E. Membrane proteins are globular, and some span the phospholipid bilayer and project from both sides
of the membrane. - ANSWER E
, Brooker Biology Exam 5-7 test bank 105
complete solutions 100%.
8. A scientist produces an artificial membrane from phospholipids and notices that oxygen, but not
glucose readily moves through the membrane. What might account for the inability of glucose to move
through the artificial membrane?
A. The artificial membrane lacked a protein needed for glucose transport.
B. The artificial membrane lacked the appropriate types of phospholipids for glucose transport.
C. Oxygen readily passes through the membrane, so glucose should have as well.
D. The membrane lacked an adequate amount of amphipathic molecules for glucose transport.
E. Thermodynamics does not allow glucose to pass through membranes produced either artificially or
from living organisms. - ANSWER A
9. Which of the following is NOT a component of plasma membranes?
A. glycosylated proteins
B. phospholipids
C. glycolipids
D. glycosylated nucleic acids
E. cholesterol - ANSWER D
10. Around what percentage of all genes encode membrane proteins?
A. 0%
B. 10%
C. 25%
D. 50%
E. 75% - ANSWER C
11. Which of the following is NOT a function of cellular membranes?
A. selective uptake and export of ions and molecules
B. cell compartmentalization
C. cell signaling
complete solutions 100%.
Brooker Biology Exam 5-7 test bank 105
complete solutions 100%.
1. Which of the following organisms is likely to contain biomembranes?
A. plants
B. animals
C. prokaryotes
D. plants and animals
E. All living organisms contain biomembranes. - ANSWER E
2. Cellular membranes are
A. fluid.
B. solely composed of lipids.
C. composed of a single layer of amphipathic molecules.
D. selective to the transport of gases and small molecules only.
E. characteristic of eukaryotes, but not prokaryotes. - ANSWER A
3. Which of the following is the major lipid found in membranes?
A. steroids
B. cholesterol
C. triglycerides
D. phospholipids
E. saturated fatty acids - ANSWER D
4. Which of the following is NOT true of the plasma membrane?
A. It is composed of an extracellular and intracellular layer of phospholipids.
B. The extracellular and intracellular layers or leaflets are highly symmetrical.
,Brooker Biology Exam 5-7 test bank 105
complete solutions 100%.
C. The membrane contains peripheral proteins.
D. Integral proteins span through the membrane.
E. The membrane contains glycolipids and glycoproteins. - ANSWER B
5. Which of the following statements about plasma membranes is INCORRECT?
A. They are composed of phospholipids.
B. They have both integral and peripheral proteins.
C. They are relatively rigid structures.
D. They are composed of two leaflets of phospholipids.
E. They function to separate the extracellular and intracellular environment. - ANSWER B
6. Scientists unearth a Wooly Mammoth from the Siberian Ice Sheath and discover that a eukaryotic
"amoeba"-like cell is still alive. Which component of the cell membrane might contribute to maintaining
the fluidity of plasma membranes under freezing conditions?
A. peripheral proteins
B. high levels of long fatty acyl tails within the lipid bilayer
C. high levels of unsaturated fatty acyl tails within the lipid bilayer
D. absence of cholesterol
E. high levels of saturated fatty acyl tails within the lipid bilayer - ANSWER C
7. Which of the following statements is CORRECT about biomembranes?
A. The phospholipid tails interact with water.
B. The phospholipid head groups are repelled by water.
C. Electron microscopy indicates the membrane looks like train tracks with two light lines of lipids
separated by a dark line containing proteins.
D. The membrane is composed of two protein layers separated by a lipid layer.
E. Membrane proteins are globular, and some span the phospholipid bilayer and project from both sides
of the membrane. - ANSWER E
, Brooker Biology Exam 5-7 test bank 105
complete solutions 100%.
8. A scientist produces an artificial membrane from phospholipids and notices that oxygen, but not
glucose readily moves through the membrane. What might account for the inability of glucose to move
through the artificial membrane?
A. The artificial membrane lacked a protein needed for glucose transport.
B. The artificial membrane lacked the appropriate types of phospholipids for glucose transport.
C. Oxygen readily passes through the membrane, so glucose should have as well.
D. The membrane lacked an adequate amount of amphipathic molecules for glucose transport.
E. Thermodynamics does not allow glucose to pass through membranes produced either artificially or
from living organisms. - ANSWER A
9. Which of the following is NOT a component of plasma membranes?
A. glycosylated proteins
B. phospholipids
C. glycolipids
D. glycosylated nucleic acids
E. cholesterol - ANSWER D
10. Around what percentage of all genes encode membrane proteins?
A. 0%
B. 10%
C. 25%
D. 50%
E. 75% - ANSWER C
11. Which of the following is NOT a function of cellular membranes?
A. selective uptake and export of ions and molecules
B. cell compartmentalization
C. cell signaling
