What best distingishes living things from nonliving matter?
What does cell division enable multicellular eukaryotes to do?
Most cell divions result in
What can a genome consist of?
Each duplicated chromosome has two sister chromatids... what are those?
What happens to the two sister chromatids during cell division?
What does meiosis yield?
What two phases does the cell cycle consist of?
Although the cells grow during all three phases, what phase are chromosomes duplicated strictly in?
In animal cells, where does the assembly of spindle microtubules begin?
How does the cell elongate during mitosis?
What happens at the end of anaphase?
What is the eukaryotic cell cycle regulated by?
Sequential events of the cell cycle are directed by what?
Cancer cells quick points
Cancers that are not eliminated by the immune system form what?
What best describes the relationship between photosynthesis and respiration?
If the power fails and the lights go dark, what will happen to CO₂ levels?
Where are the molecules of the electron transport chain found in plant cells?
Which of the following are directly associated with photosystem I?
A plant has a unique photosynthetic pigment. The leaves of this plant appear to be reddish yellow. What wavelengths of visible light are being absorbed by this pigment?
Which of the following statements is a correct distinction between autotrophs and heterotrophs?
Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin cycle?`
In autotrophic bacteria, where are the enzymes located that can carry on carbon fixation (reduction of carbon dioxide to carbohydrate)?
Some photosynthetic bacteria (e.g., purple sulfur bacteria) have only photosystem I, whereas others (e.g., cyanobacteria) have both photosystem I and photosystem II. Which of the following might this observation imply?
In the process of carbon fixation, RuBP attaches a CO₂ to produce a six-carbon molecule, which is then split to produce two molecules of 3-phosphoglycerate. After phosphorylation and reduction produces glyceraldehyde 3-phosphate (G3P), what more needs to happen to complete the Calvin cycle?
CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they
What does the chemiosmotic process in chloroplasts involve?
Which of the following sequences correctly represents the flow of electrons during photosynthesis?
If atmospheric CO₂ concentrations increase twofold or more, how will plants be affected, disregarding any changes in climate?
Which of the events listed below occurs in the light reactions of photosynthesis?
In thylakoids, protons travel through ATP synthase from the thylakoid space to the stroma. Therefore, the catalytic "knobs" of ATP synthase would be located
The splitting of carbon dioxide to form oxygen gas and carbon compounds occurs during
The alternative pathways of photosynthesis using the C₄ or CAM systems are said to be compromises. Why?
78) A particular cell has half as much DNA as some other cells in a mitotically active tissue. The cell in question is most likely in
74) One difference between cancer cells and normal cells is that cancer cells
16) For anaphase to begin, which of the following must occur?
10) Taxol is an anticancer drug extracted from the Pacific yew tree. In animal cells, Taxol disrupts microtubule formation by binding to microtubules and accelerating their assembly from the protein precursor, tubulin. Surprisingly, this stops mitosis. Specifically, Taxol must affect
50) For a chemotherapeutic drug to be useful for treating cancer cells, which of the following is most desirable?
11) Which of the following are primarily responsible for cytokinesis in plant cells but not in animal cells?
71) When the cell has just completed telophase, which of the following does he see?
9) Where do the microtubules of the spindle originate during mitosis in both plant and animal cells?
1) The centromere is a region in which
76) In the cells of some organisms, mitosis occurs without cytokinesis. This will result in
46) All cell cycle checkpoints are similar in which way?
Several organisms, primarily protists, have what are called intermediate mitotic organization.
preliminary observations showed them that the cell line did not exhibit either density-dependent inhibition or anchorage dependence. What could they conclude right away?
37) Density-dependent inhibition is explained by which of the following?
Plants and some algae undergo an alternation of generation
Since meiosis undergoes two sets of clel divisions unlike mitosis, what is the end result?
Meiosis II is very similar to mitosis and occurs in the same four phases
At the end of meiosis
Three events that are unique to meiosis
Three mechanisms that contribute to genetic variation