A. tubulin is involved in chromosome segregation in binary fission.
B. cytokinesis occurs only in binary fission.
C. binary fission results in daughter cells with differing genetic makeup.
D. DNA replication does not take place in eukaryotic cells.
E. a spindle is involved in chromosome segregation in eukaryotic cells.
A. involves chromosomes lining up at the equatorial plate.
B. occurs just before cytokinesis.
C. is the phase during which sister chromatids separate and move to opposite poles.
D. occurs before the nuclear envelope breaks down.
E. occurs just after cytokinesis.
A. only before mitosis.
B. before both mitosis and meiosis.
C. during chromosome condensation.
D. during G2.
E. only before meiosis
A. two; sister chromatids; daughter
B. four; sister chromosomes; daughter
C. two; daughter chromosomes; sister
D. four; sister chromatids; daughter
E. two; daughter chromatids; sister
A.CDKs use ATP as a substrate.
B. Cyclin is made continuously during the cell cycle.
C. Different CDKs act at different points in the cell cycle.
D. Phosphorylated retinoblastoma protein is inactive.
E. A CDK can catalyze the phosphorylation of retinoblastoma protein.
A. involves actin in both animals and plants.
B. precisely distributes organelles.
C. involves the Golgi apparatus in plants.
D. uses the same motor proteins in animals and plants
E. does not require energy.
A. are rare.
B. are the breaking and rejoining of chromatids of homologous chromosomes.
C. are not likely to affect gene expression.
D. cannot be passed to offspring.
E. can occur in mitotic cells.
A. It occurs in humans.
B. Aneuploidy results when a piece of one chromosome translocates to another chromosome.
C. Trisomies are common in human zygotes.
D. It results from chromosomal nondisjunction.
E. An individual with an extra chromosome is trisomic.
A. 35S; 35S-cysteine
B. 32P; 32P-phospholipid
C. 35S; 35S-sulfate
D. 14C; 14C-carbon dioxide
E. 32P; 32P-phosphate
A. genetically identical daughter cells are produced.
B. pairing of homologous chromosomes occurs.
C. crossing over cannot take place.
D. there is no cytokinesis.
E. only two daughter cells are formed.
A. occurs only in animals.
B. is the same process as necrosis.
C. is triggered solely by signals external to the cell.
D. occurs only during development.
E. is controlled by signal transduction pathways.
A. In asexual reproduction, two gametes fuse to produce a zygote.
B. n asexual reproduction, there is genetic variation among the offspring.
C. Asexual reproduction requires meiosis.
D. Asexual reproduction produces offspring that are genetically identical to the parent.
E. In asexual reproduction, progeny have half the number of chromosomes as the parent.
A.prophase I of meiosis.
B. prophase II of meiosis.
C. prophase I of mitosis.
D. prophase I and II of meiosis.
E. anaphase II of meiosis.
A. is composed of two different types of microtubules.
B. provides the force needed for chromosome movement.
C. plays a role in cytokinesis.
D. begins to form during metaphase.
E. is composed of intermediate filaments.
A. gamete formation.
C. spore formation.
A. The synthesis of cellular components necessary for mitosis
C. The condensation of chromatin
D. DNA replication
A. DNA replication occurs.
B. chromosomes do not condense.
C. crossing over occurs.
D. sister chromatids are separated.
E. four genetically identical cells are generated.
Cell cycle Phase Dye Intensity
G 0 52
A. G1 phase
B. G0 phase
C. G2 phase
D. S phase
E. M phase