Bio Chapter 10 Cell reproduction
____ organized on chromosomes carry the information that controls the functions of the cell. a. Histones b. Genes c. Nucleosomes d. Proteins
B. Genes
The ____ is responsible for the separation of the chromosomes during the ____ of mitosis. a. mitotic spindle; interphase b. mitotic spindle; anaphase c. centromere; telophase d. kinetochore; prophase
B. Mitotic spindle; anaphase
To prevent disastrous consequences, the eukaryotic cell cycle is controlled by: a. replication. b. environmental signals. c. a series of cell cycle checkpoints. d. interphase
C. A series of cell cycle checkpoints
A bacterial chromosome consists of a: a. a single linear chromosome b. multiple circular chromosomes c. a single circular chromosome d. multiple linear chromosomes
C. A single circular chromosome
Why is it important for DNA to be copied before cell division? a. The daughter cells need extra copies of the genetic information present in the parent cell. b. The nucleus does not contain enough room for extra DNA. c. Genetic information must be transmitted to the daughter cells. d. The daughter cells do not need DNA
C. Genetic information must be transmitted to the daughter cells
The cell cycle of a typical somatic cell consists of __________ and M phase. a. cytokinesis b. the S phase c. interphase d. Meiosis
C. Interphase
Chromosomes are duplicated during __________ of the cell cycle. a. G2 phase b. G0 phase c. S phase d. G1 phase
C. S phase
A cell is in metaphase if: a. the nuclear envelope is clearly visible. b. cytokinesis is occurring. c. the chromosomes are aligned at the midplane of the cell. d. the chromosome are separated into distinct groups at opposite poles of the cell.
C. The chromosomes are aligned at her mid plane of the cell
Cytokinesis in plant cells occurs via the formation of a(n): a. cell plate. b. mitotic spindle. c. plasma membrane d. cleavage furrow
A. Cell plate
During prophase, __________ is(are) compacted into visible chromosomes. a. chromatin b. centrioles c. centromeres d. kinetochores
A. Chromatin
The mitotic spindle is made of: a. microtubules b. histones. c. collagen d. keratin.
A. Microtubules
__________ contain identical DNA sequences and are held together by __________ during mitosis. a. Sister chromatids; centromeres b. Sister chromatids; spindle fibers c. Daughter chromosomes; hydrogen bonding d. Sister chromosomes; histone proteins
A. Sister chromatids; centromeres
Nucleosomes are best described as: a. prokaryotic DNA associated with histone proteins. b. prokaryotic DNA associated with nonhistone proteins. c. eukaryotic DNA associated with nonhistone proteins. d. eukaryotic DNA associated with histone proteins.
D. Eukaryotic DNA associated with histone proteins
If a cell is in G2: a. it is in mitosis. b. it lacks a visible nuclear membrane. c. it has visibly distinct chromosomes. d. it has twice the amount of DNA present in a telophase nucleus.
D. It has twice the amount of DNA present in a telophase nucleus
Eukaryotic chromosomes consist of: a. multiple circular chromosomes b. a single linear chromosome c. a single circular chromosome d. multiple linear chromosomes
D. Multiple linear chromosemes