Which of the following types of molecules are the major structural components of the celll membrane?
which of the following most accurately describes selective permeability?
diffusion is an example of
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?
what kinds of molecules pass through a cell membrane most easily?
A cell that neither gains nor loses water when it is immersed in a solution is
Which of the following is true of osmosis?
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?
Which of the following membrane activities require energy from ATP hydrolysis?
Which of the following would likely move through the lipid bilayer of a plasma membrane most rapidly?
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?
An organism with a cell wall would most likely be unable to take in materials through which of the following process?
What is energy?
Which term most precisely describes the cellular process of breaking down large molecules into smaller ones?
Which of the following is a statement of the first law of thermodynamics?
Which of the following is an example of potential rather than kinetic energy?
How does a noncompetitive inhibitor decrease the rate of an enzyme reaction?
Which of the following is (are) true for anabolic pathways?
When chemical, transport, or mechanical work is done by an organism, what happens to the heat generated?
Which of the following statements is representative of the second law of thermodynamics?
According to the induced-fit hypothesis of enzyme catalysis, which of the following is correct?
The waste products of cellular respiration include _
Where does glycolysis take place in eukaryotic cells?
In addition to ATP, what are the end products of glycolysis?
Carbon dioxide (CO) is released during which of the following stages of cellular respiration?
Where are the proteins of the electron transport chain located?
Which of the following statements describes the results of this reaction?
C6H1206 + 602 → 6 CO2 + 6H20 + Energy
How many carbon atoms are fed into the citric acid cycle as a result of the oxidation of the transition reaction of one glucose?
Which process in eukaryotic cells will proceed normally whether oxygen (O) is present or absent?
The oxygen consumed during cellular respiration is involved directly in which process or event?
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?
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?
Name the process prokaryotes use to make exact copies of themselves.
The correct sequence of stages of mitosis is _
If there are 20 chromosomes in a non-dividing cell, how many sister chromatids are there at the start
of mitosis?
At which phase are sister chromatids beginning to move apart in animal cells?
What phase of the cell cycle is this?
spindle fibers grabbing cell in the middle
The cell cycle results in the production of
What occurs at the centromere?
Why do neurons and some other specialized cells divide infrequently?
A cell that completed the cell cycle without undergoing cytokinesis would
Starting with a fertilized egg (zygote), a series of five cell divisions would produce an early embryo with how many cells?
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?
What chromosomes belong to a normal human male?
Homologous chromosomes
Which of the following happens at the conclusion of meiosis I?
A ____ describes a site of crossing over.
The human X and Y chromosomes
Which of the following occurs in meiosis but not in mitosis?
Which of the following is true of a species that has a chromosome number of 2n = 16?
Which of the following is a characteristic seen in prophase I that does not occur in prophase II?