question

small body single color chromosomes same to produce without, lack of, not self both, double

answer

micro- -some(or soma-) haplo- chrom- ploid homo-(or homeo-) -gen- a-(or an-) auto- diplo-

question

one between moving thread many two before cell end segment, body section

answer

uni- inter- kin-(or kinet-) mito multi- bi- pro- -cyte(or cyto) telo- -mere

question

During _____ both the contents of the nucleus and the cytoplasm are divided. G2 S mitosis G1 the mitotic phase

answer

the mitotic phase

question

During _____ the cell grows and replicates both its organelles and its chromosomes. cytokinesis G1 S interphase mitosis

answer

interphase

question

Nucleoli are present during _____. prophase anaphase prometaphase metaphase interphase

answer

interphase

question

Cytokinesis often, but not always, accompanies _____. anaphase telophase prometaphase metaphase interphase

answer

telophase

question

Chromosomes become visible during _____. metaphase prophase prometaphase anaphase interphase

answer

prophase

question

Centromeres divide and sister chromatids become full-fledged chromosomes during _____. anaphase interphase prometaphase metaphase telophase

answer

anaphase

question

Spindle fibers attach to kinetochores during _____. telophase anaphase prometaphase interphase metaphase

answer

prometaphase

question

During prophase a pair of chromosomes consists of _____. four chromosomes and two chromatids two chromosomes and four chromatids two chromosomes and two chromatids one chromosome and four chromatids one chromosome and two chromatids

answer

two chromosomes and four chromatids

question

Which of the following is a function of the S phase in the cell cycle? The synchronization of organelle division The separation of sister chromatids The sorting of chromosomes The synthesis of sister chromatids

answer

the synthesis of sister chromatids

question

The copying of chromosomes occurs during which of the following phases of the cell cycle? G2 phase G1 phase S phase M phase

answer

S phase

question

For the first several divisions of early frog embryos, cells proceed directly from the M phase to the S phase and back to M without gaps. Which of the following is likely to be true about dividing cells in early frog embryos? The number of chromosomes decreases with each generation. Frog embryos do not have DNA. The cells get smaller with each generation. The cells do not divide by mitosis.

answer

the cells get smaller with each generation

question

True or false? The M phase is characterized by the replication and division of a cell's chromosomes. True False

answer

false

question

If an organism normally has 34 chromosomes, how many molecules of DNA should there be in the G1 phase of the cell cycle? 136 34 68 17

answer

34

question

Which of the following events would cause the cell cycle to arrest? Complete chromosome replication Poor nutrient conditions Synthesis of cyclins by growth factors and activation of a cyclin-Cdk complex Chromosomes lined up along the metaphase plate

answer

poor nutrient conditions

question

DNA replication produces two identical DNA molecules called _______.

answer

sister chromatid(s)

question

After chromosomes condense, the _______ is the region where the identical DNA molecules are most tightly attached to each other.

answer

centromere(s)

question

During mitosis,, microtubules attach to chromosomes at the ________.

answer

kinetochore(s)

question

In dividing cells, most the cell's growth occurs during _______.

answer

interphase

question

The _______ is a cell structure consisting of microtubules, which forms during early mitosis and plays a role in cell division.

answer

mitotic spindle(s)

question

During interphase, most of the nucleus is filled with a complex of DNA and protein in a dispersed form called _________.

answer

chromatin

question

In most eukaryotes, division of the nucleus is followed by ________, when the rest of the cell divides.

answer

cytokinesis

question

The _________ are the organizing centers for microtubules involved in separating chromosomes during mitosis.

answer

centrosome(s)

question

Are sister chromatids present in all or part of this phase?

answer

G1: no S: yes G2: yess beginning of M: yes End of M: no

question

Is the DNA condensed in all or part of this phase?

answer

G1: no S: no G2: no beginning of M: yes end of M: yes

question

Does the cell contain twice as much DNA in this phase as it did in the G1 phase?

answer

G1: no S: yes G2: yes beginning of M: yes end of M: yes

question

Sort each process into the appropriate bin to indicate the stage of mitosis in which it occurs. If a process occurs in more than one stage, sort it to the stage when it first occurs. microtubules attach to kinetochores cohesins break down cohesins join sister chromatids of duplicated chromosome kinetochores are motionless in relation to poles of cell kinetochores move toward poles of cell spindle microtubles disassemble tubulins assemble into spindle microtubules

answer

PROPHASE tubulins assemble into spindle microtubules cohesins join sister chromatids of duplicated chromosome PROMETAPHASE microtubules attach to kinetochores METAPHASE kinetochores are motionless in relation to poles of cell ANAPHASE kinetochores move toward poles of cell cohesins break down TELOPHASE spindle microtubules disassemble

question

During prophase,the microtubules of the mitotic spindle_______ During anaphase, the nonkinetochore microtubules______and move past each other, and the kinetochore microtubules_____ During telophase, the nonkinetochore microtubules ______.

answer

lengthen lengthen, shorten disassemble

question

Will this cell elongate during mitosis? Will the sister chromatids separate from each other? Will the chromosomes move to the poles of the cell?

answer

yes yes no

question

Vinblastine is a standard chemotherapeutic drug used to treat cancer. Because it interferes with the assembly of micro-tubules, its effectiveness must be related to suppression of cyclin production. disruption of mitotic spindle formation. inhibition of regulatory protein phosphorylation. inhibition of DNA synthesis. myosin denaturation and inhibition of cleavage furrow formation.

answer

disruption of mitotic spindle formation

question

One difference between cancer cells and normal cells is that cancer cells are unable to synthesize DNA. are arrested at the S phase of the cell cycle. continue to divide even when they are tightly packed together. cannot function properly because they are affected by density-dependent inhibition. are always in the M phase of the cell cycle.

answer

continue to divide even when they are tightly packed together

question

The decline of MPF activity at the end of mitosis is due to the accumulation of cyclin. the destruction of the protein kinase Cdk. synthesis of DNA. decreased synthesis of Cdk. the degradation of cyclin.

answer

the degradation of cyclin

question

In the cells of some organisms, mitosis occurs without cytokinesis. This will result in destruction of chromosomes. cells with more than one nucleus. cells lacking nuclei. cells that are unusually small. cell cycles lacking an S phase.

answer

cells with more than one nucleus

question

Which of the following does not occur during mitosis? separation of the spindle poles spindle formation replication of the DNA condensation of the chromosomes separation of sister chromatids

answer

replication of the DNA

question

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 G1. prophase. anaphase. metaphase. G2.

answer

G1

question

The drug cytochalasin B blocks the function of actin. Which of the following aspects of the animal cell cycle would be most disrupted by cytochalasin B? cleavage furrow formation and cytokinesis cell elongation during anaphase spindle formation spindle attachment to kinetochores DNA synthesis

answer

cleavage furrow formation and cytokinesis

question

If a eukaryotic cell is in the G1 phase of the cell cycle, which statement about the cell's chromosomes must be correct? Each chromosome is made of a complex of DNA and associated proteins. The chromosomes are preparing for DNA synthesis. Each chromosome consists of two identical chromatids.

answer

each chromosome is made of complex of DNA and associated proteins

question

Which statement provides the best description of the interphase portion of the cell cycle? Interphase is a resting stage prior to cell division. During interphase, a cell is metabolically active. Interphase is a brief period between mitosis and chromosome duplication.

answer

during interphase, a cell is metabolically active

question

How do cancer cells differ from normal cells? Cancer cells may be immortal. Cultured cancer cells exhibit anchorage dependence. Cancer cells trigger chromosomal changes in surrounding cells.

answer

cancer cells may be immortal

question

The cell cycle control systems of cancer cells differ from those of normal cells. Select the best explanation for this fact. Cancer cells divide excessively and invade other tissues. Genetic changes alter the function of the cancer cell's protein products. Cancer cells are immortal.

answer

genetic changes alter the function of the cancer cell's protein products

question

During mitosis,, microtubules attach to chromosomes at the ________.

answer

kinetochore(s)

BIOLOGY: Campbell’s Chapter 12: Cell Cycle – Flashcards

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