CELL & MOLECULAR BIOLOGY KARP CHAPTERS 1-4 WITH COMPLETE
QUESTIONS| ACTUAL EXAM| SCORED A+|CORRECT ANSWERS AND
RATIONALE| VERIFIED| ASSURED PASS
Most of the functions of a cell membrane are performed by ________.
a. proteins.
b. glycolipids.
c. cholesterol.
d. None of these. - CORRECT ANSWERS-proteins.
Which of the following is NOT found in DNA?
a) adenine
b) uracil
c) cytosine
d) thymine - CORRECT ANSWERS-uracil
How do the membranes of eukaryotic cells vary?
a. Some proteins are unique to each membrane.
b. Some membranes are not selectively permeable.
c. Some membranes have unique molecules that have yet to be characterized.
d. None of these. - CORRECT ANSWERS-Some proteins are unique to each membrane.
The major component of cell membranes is _________.
a. attached carbohydrate moieties.
b. the presence of protein channels.
c. cholesterol.
d. a lipid bilayer. - CORRECT ANSWERS-a lipid bilayer.
Membranes contain a wide diversity of lipids, including ________.
,a. triglycerides, cholesterol and phosphoglycerides
b. cholesterol, phosphoglycerides and sphingolipids
c. phosphoglycerides, sphingolipids and triglycerides
d. cholesterol, triglycerides and sphingolipids - CORRECT ANSWERS-cholesterol,
phosphoglycerides and sphingolipids
Which of the following is NOT a function of the plasma membrane?
a. Compartmentalization.
b. Responding to external signals.
c. Providing a nonselective permeable barrier.
d. Scaffold for biochemical activities. - CORRECT ANSWERS-Providing a nonselective
permeable barrier.
-it is selective
Model organisms used by cell and molecular biologists include all of the following EXCEPT:
a) mice.
b) bacteria.
c) nematodes.
d) orangutans. - CORRECT ANSWERS-orangutans
Which of the following structures is the smallest?
a) chloroplast
b) lipid bilayer
c) mitochondrion
d) DNA molecule - CORRECT ANSWERS-DNA molecule
Which of the following statements about viruses is FALSE?
a) They can only be found associated with animal and bacterial cells.
, b) They are smaller than bacteria.
c) They are responsible for numerous human diseases.
d) Some of them can become integrated into the DNA of the host's cell. - CORRECT
ANSWERS-They can only be found associated with animal and bacterial cells.
Contrary to viruses, bacteria:
a) contain genetic material in the form of DNA or RNA.
b) can be infected by bacteriophages.
c) have only 3 or 4 genes.
d) are microscopic. - CORRECT ANSWERS-can be infected by bacteriophages.
The hypothesis that explains the origin of eukaryotic cells as the result of two or more simpler cells
developing a relationship with one another is called:
a) panspermia.
b) symbiosis.
c) evolution theory.
d) endosymbiont theory. - CORRECT ANSWERS-endosymbiont theory.
A phylogenetic tree based on rRNA sequence comparisons show that the three domains of life are:
a) Bacteria, Archaea, and Eucarya
b) Bacteria, Plantae, and Eukarya.
c) Archaea, Eucarya, and Fungi.
d) Archaea, Eukarya, and Cyanobacteria. - CORRECT ANSWERS-Bacteria, Archaea, and
Eucarya
The evolutionary relationship among cell types can be studied by comparing:
a) the sequence of genes.
b) the presence or absence of organelles.
c) the environment where the cells are usually found.
d) the cell shape. - CORRECT ANSWERS-the sequence of genes.
QUESTIONS| ACTUAL EXAM| SCORED A+|CORRECT ANSWERS AND
RATIONALE| VERIFIED| ASSURED PASS
Most of the functions of a cell membrane are performed by ________.
a. proteins.
b. glycolipids.
c. cholesterol.
d. None of these. - CORRECT ANSWERS-proteins.
Which of the following is NOT found in DNA?
a) adenine
b) uracil
c) cytosine
d) thymine - CORRECT ANSWERS-uracil
How do the membranes of eukaryotic cells vary?
a. Some proteins are unique to each membrane.
b. Some membranes are not selectively permeable.
c. Some membranes have unique molecules that have yet to be characterized.
d. None of these. - CORRECT ANSWERS-Some proteins are unique to each membrane.
The major component of cell membranes is _________.
a. attached carbohydrate moieties.
b. the presence of protein channels.
c. cholesterol.
d. a lipid bilayer. - CORRECT ANSWERS-a lipid bilayer.
Membranes contain a wide diversity of lipids, including ________.
,a. triglycerides, cholesterol and phosphoglycerides
b. cholesterol, phosphoglycerides and sphingolipids
c. phosphoglycerides, sphingolipids and triglycerides
d. cholesterol, triglycerides and sphingolipids - CORRECT ANSWERS-cholesterol,
phosphoglycerides and sphingolipids
Which of the following is NOT a function of the plasma membrane?
a. Compartmentalization.
b. Responding to external signals.
c. Providing a nonselective permeable barrier.
d. Scaffold for biochemical activities. - CORRECT ANSWERS-Providing a nonselective
permeable barrier.
-it is selective
Model organisms used by cell and molecular biologists include all of the following EXCEPT:
a) mice.
b) bacteria.
c) nematodes.
d) orangutans. - CORRECT ANSWERS-orangutans
Which of the following structures is the smallest?
a) chloroplast
b) lipid bilayer
c) mitochondrion
d) DNA molecule - CORRECT ANSWERS-DNA molecule
Which of the following statements about viruses is FALSE?
a) They can only be found associated with animal and bacterial cells.
, b) They are smaller than bacteria.
c) They are responsible for numerous human diseases.
d) Some of them can become integrated into the DNA of the host's cell. - CORRECT
ANSWERS-They can only be found associated with animal and bacterial cells.
Contrary to viruses, bacteria:
a) contain genetic material in the form of DNA or RNA.
b) can be infected by bacteriophages.
c) have only 3 or 4 genes.
d) are microscopic. - CORRECT ANSWERS-can be infected by bacteriophages.
The hypothesis that explains the origin of eukaryotic cells as the result of two or more simpler cells
developing a relationship with one another is called:
a) panspermia.
b) symbiosis.
c) evolution theory.
d) endosymbiont theory. - CORRECT ANSWERS-endosymbiont theory.
A phylogenetic tree based on rRNA sequence comparisons show that the three domains of life are:
a) Bacteria, Archaea, and Eucarya
b) Bacteria, Plantae, and Eukarya.
c) Archaea, Eucarya, and Fungi.
d) Archaea, Eukarya, and Cyanobacteria. - CORRECT ANSWERS-Bacteria, Archaea, and
Eucarya
The evolutionary relationship among cell types can be studied by comparing:
a) the sequence of genes.
b) the presence or absence of organelles.
c) the environment where the cells are usually found.
d) the cell shape. - CORRECT ANSWERS-the sequence of genes.
