Which of the following types of molecules are the major structural components of the celll membrane?
Question 2
2.
which of the following most accurately describes selective permeability?
Question 3
3.
diffusion is an example of
Question 4
4.
glucose diffuses slowly through artificial phospholipid bilayers. the cells lining the small intestine, however, rapidly move large quantities of glucose from the glucose-rich food into their glucose-poor cytoplasm. using this information, which transport mechanism is most probably functioning in the intestinal cells?
Question 5
5.
what kinds of molecules pass through a cell membrane most easily?
Question 6
6.
A cell that neither gains nor loses water when it is immersed in a solution is
Question 7
7.
Which of the following is true of osmosis?
Question 8
8.
Mammalian blood contains the equivalent of 0.15 M NaCl. Seawater contains the equivalent of 0.45
M NaCl. What will happen if red blood cells are transferred to seawater?
Question 9
9.
Which of the following membrane activities require energy from ATP hydrolysis?
Question 10
10.
Which of the following would likely move through the lipid bilayer of a plasma membrane most rapidly?
Question 11
11.
Celery stalks that are immersed in fresh water for several hours become stiff and hard. Similar stalks left in a 0.15 M salt solution become limp and soft. From this, what can we deduce about the cells of the celery stalks?
Question 12
12.
An organism with a cell wall would most likely be unable to take in materials through which of the following process?
Question 13
13.
What is energy?
Question 14
14.
Which term most precisely describes the cellular process of breaking down large molecules into smaller ones?
Question 15
15.
Which of the following is a statement of the first law of thermodynamics?
Question 16
16.
Which of the following is an example of potential rather than kinetic energy?
Question 17
17.
How does a noncompetitive inhibitor decrease the rate of an enzyme reaction?
Question 18
18.
Which of the following is (are) true for anabolic pathways?
Question 19
19.
When chemical, transport, or mechanical work is done by an organism, what happens to the heat generated?
Question 20
20.
Which of the following statements is representative of the second law of thermodynamics?
Question 21
21.
According to the induced-fit hypothesis of enzyme catalysis, which of the following is correct?
Question 22
22.
The waste products of cellular respiration include _
Question 23
23.
Where does glycolysis take place in eukaryotic cells?
Question 24
24.
In addition to ATP, what are the end products of glycolysis?
Question 25
25.
Carbon dioxide (CO) is released during which of the following stages of cellular respiration?
Question 26
26.
Where are the proteins of the electron transport chain located?
Question 27
27.
Which of the following statements describes the results of this reaction?
C6H1206 + 602 → 6 CO2 + 6H20 + Energy
Question 28
28.
How many carbon atoms are fed into the citric acid cycle as a result of the oxidation of the transition reaction of one glucose?
Question 29
29.
Which process in eukaryotic cells will proceed normally whether oxygen (O) is present or absent?
Question 30
30.
The oxygen consumed during cellular respiration is involved directly in which process or event?
Question 31
31.
During glycolysis, when each molecule of glucose is catabolized to two molecules of pyruvate, what happens to most of the potential energy contained in glucose?
Question 32
32.
What fraction of the carbon dioxide exhaled by animals is generated by the reactions of the citric acid cycle, if glucose is the sole energy source?
Question 33
33.
Name the process prokaryotes use to make exact copies of themselves.
Question 34
34.
The correct sequence of stages of mitosis is _
Question 35
35.
If there are 20 chromosomes in a non-dividing cell, how many sister chromatids are there at the start
of mitosis?
Question 36
36.
At which phase are sister chromatids beginning to move apart in animal cells?
Question 37
37.
What phase of the cell cycle is this?
spindle fibers grabbing cell in the middle
Question 38
38.
The cell cycle results in the production of
Question 39
39.
What occurs at the centromere?
Question 40
40.
Why do neurons and some other specialized cells divide infrequently?
Question 41
41.
A cell that completed the cell cycle without undergoing cytokinesis would
Question 42
42.
Starting with a fertilized egg (zygote), a series of five cell divisions would produce an early embryo with how many cells?
Question 43
43.
In a human karyotype, chromosomes are arranged in 23 pairs. If we choose one of these pairs, such as pair 14, which of the following do the two chromosomes of the pair have in common?
Question 44
44.
What chromosomes belong to a normal human male?
Question 45
45.
Homologous chromosomes
Question 46
46.
Which of the following happens at the conclusion of meiosis I?
Question 47
47.
A ____ describes a site of crossing over.
Question 48
48.
The human X and Y chromosomes
Question 49
49.
Which of the following occurs in meiosis but not in mitosis?
Question 50
50.
Which of the following is true of a species that has a chromosome number of 2n = 16?
Question 51
51.
Which of the following is a characteristic seen in prophase I that does not occur in prophase II?