Cell division in multicellular organisms is important for _____. A. growth B. repair C. both A and B ___.

Cell division in multicellular organisms is important for _____.

A. growth B. repair C. both A and B ___

Which best describes prokaryotes?

A. unicellular bacteria B. prominent nucleus C. many chloroplasts D. all of the above

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Chromosomes are composed of _____.

A. DNA only B. proteins only C. DNA and proteins ___

Prokaryotes' DNA is found in the _____.

A. nucleoid B. nucleolus C. nucleus

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Prokaryotes reproduce _____.

A. by binary fission B. sexually C. very slowly

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Which process ensures that each newly formed cell gets its own copy of the DNA?

A. transcription B. replication C. cytokinesis

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The diploid number of chromosomes in humans is _____.

A. 1 B. 20 C. 46 D. 78

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In a eukaryotic cell that is NOT undergoing division, the tangled mass of DNA and its associated proteins is known as_____.

A. sister chromatids B. centromeres C. chromatin D. histones

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The division of cytoplasm is called _____.

A. replication B. karyokinesis C. binary fission D. cytokinesis ___

If a cell with 46 chromosomes undergoes mitosis, the daughter cells will have _____ chromosomes.

A. 23 B. 46 C. 92

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In many animals, only _____ are haploid cells.

A. eggs B. sperm C. both A and B ___

The region where sister chromatids are attached to one another is called the _____.

A. centromere B. spindle C. aster D. centriole

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During prophase, it is apparent that nuclear division is about to occur because _____.

A. the chromatin has condensed B. the chromosomes are visible structures C. both A and B ___

The _____ most likely provide(s) the material for spindle formation.

A. nucleus B. cytoskeleton C. sister chromatids D. plasma membrane

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Which of the following distinguishes an animal cell from a plant cell

A. centrioles B. spindle C. asters D. both A and C ___

Which of the following is NOT associated with prophase?

A. fragmentation of the nuclear envelope B. disappearance of the nucleolus C. separation of the sister chromatids D. visible chromosomes

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The first phase of nuclear division is called _____.

A. telophase B. metaphase C. prophase D. interphase

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After _____ nuclear division is completed.

A. prophase B. metaphase C. telophase D. interphase

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Alignment of the chromosomes at the equator of the spindle is characteristic of _____.

A. metaphase B. prophase C. anaphase D. telophase

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The nuclear envelopes re-form, chromosomes unwind back into chromatin, nucleoli reappear, and the spindledisappears during _____.

A. prophase B. telophase C. metaphase D. anaphase

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During __________, the chromosomes attach to the spindle and begin to align at the metaphase plate of the spindle.

A. telophase B. prometaphase C. anaphase D. prophase

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The sister chromatids separate from each other during _____.

A. prophase B. telophase C. anaphase D. metaphase

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The spindle begins to assemble during _____.

A. prophase B. prometaphase C. metaphase D. anaphase

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Meristem tissue is found in the __________ of a plant.

A. root tips B. shoot tips C. stems D. all of the above ___

In plant cells, the vesicles which move along microtubules to the midpoint between the two daughter nuclei fuse to form acell __________.

A. membrane B. plate C. wall

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Daughter cells as a result of mitosis have a complete copy of _____.

A. chromosomes B. genes C. both A and B ___

The separation of the two daughter cells during animal cell division begins when the _____ forms.

A. cell wall B. spindle C. cleavage furrow D. cell plate

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The period of DNA replication in the cell cycle is called the _____.

A. M stage B. G1 stage C. S stage D. G2 stage

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Interphase consists of the __________ stages of cellular growth and division.

A. G1, G2 and M B. G1, S and G2 C. M, S, and G2 D. M, S and G1

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The enzyme that removes a phosphate group from ATP is called _____.

A. cyclin B. kinase C. lipase D. cellulose

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Movement of a cell through the various stages of the cell cycle appears to be controlled by _____.

A. kinase B. growth factors C. cyclins D. all of the above ___

The cell grows in size and the number of cellular organelles increases during the _____ stage of the cell cycle.

A. G1 B. S C. G2 D. M

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The length of the different stages of the cell cycle _____.

A. varies among species B. varies among different cells in the same individual C. both A and B ___

When most cancers occur, _____ is absent or nonfunctional.

A. the p53 gene B. survivin C. angiogenesis

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Which of the following is/are (a) mutagenic carcinogen(s)?

A. radiation B. tobacco smoke C. viruses D. all of the above ___

Programmed cell death is known as _____.

A. mitosis B. cytokinesis C. apoptosis ___

The p53 protein _____.

A. inhibits repair enzymes B. stops the cell cycle during repair

C. inhibits apoptosis D. all of the above

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Which of the following characteristics is displayed by cancer cells?

A. contact inhibition B. normal looking nuclei C. specialization D. chromosome mutations ___

A disorganized, generally encapsulated mass that does not invade adjacent tissue is known as a _____.

A. neoplasia B. benign tumor C. anaplasia

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Colon cancer may be prevented by _____.

A. smoking B. high-fiber diets C. alcohol consumption D. hormone therapy

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New methods of cancer treatment prevent _____ which cuts off the supply of nutrients and oxygen to the tumor.

A. metastasis B. angiogenesis C. differentiation D. anaplasia

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About 87% of all lung cancer cases are related to _____.

A. radon exposure B. asbestos exposure C. smoking D. alcohol consumption

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