USA Test prep ch.6 44 questions

Events that damage the cell's regulatory apparatus can cause the uncontrolled division of cells called A) cancer. B) hyperplasia. C) mutation. D) phosphorylation.

A. Cancer

In the typical cell cycle, DNA synthesis occurs in the _________ phase. A) S B) G2 C) G1 D) H 6

A. S

Cell division is preceded by two growth phases. Besides growth, both G1 and G2 A) contain checkpoints that determine if the cycle will continue. B) help move chromosomes to the new daughter cells. C) produce more chromosomes before the cell divides. D) grow and produce enough cytoplasm to fill two cells.

A. contain checkpoints that determine if the cycle will continue

Which process results in two daughter cells each having the same number of chromosomes as the parent cell? A) meiosis B) mitosis C) photosynthesis D) cytokinesis

A. meiosis

During cell division, or mitosis, an exact duplicate of the original cell is produced. The instructions for cell division are found in the __________ in the __________. A) nucleus:RNA B) chromosomes:nucleus C) nucleus:nucleolus D) ribosomes:RNA

B) chromosomes:nucleus

Scientists produce plants from tissue culture in the lab. The new plants are produced under sterile conditions, to produce clones of the parent plant. The new plants A) have traits of both parents. B) are identical to the parent plant. C) are the product of sexual reproduction. D) are different traits from the parent plant.

B. are identical to the parent plant.

Which of these would BEST describe what would happen to a cell in a time of low nutrient supply? A) The cell's growth would speed up significantly, leading to longer periods of time between cell division. Eliminate B) The cell's growth would slow down significantly, leading to longer periods of time between cell division. C) The cell's growth would speed up significantly, leading to shorter periods of time between cell division. D) The cell's growth would slow down significantly, leading to shorter periods of time between cell division.

B.The cell's growth would slow down significantly, leading to longer periods of time between cell division.

All organisms undergo DNA replication for reproduction, growth, repair, etc. DNA replication occurs just before the process of A) meiosis. B) mitosis. C) transcription. D) translation.

B.mitosis

The diagrams show different stages of cell division in the somatic cells of a plant. The stages are not shown in order. Which statement correctly lists the order of the stages? A) P, R, Q B) Q, R, P C) R, P, Q D) P, Q, R

C) R, P, Q

According to biogenesis, the fir tree began life when fertilization occurred to produce a single cell A) and grew to its mature form as a result of meiosis. B) and grew into its mature form as a result germination. C) and grew to its mature form as a result of cell division. D) and grew to its mature form as a result of fragmentation.

C) and grew to its mature form as a result of cell division.

In which stage do the chromatids get separated and move toward opposite ends of the cell? A) P B) Q C) R D) S

C.R

The illustration labeled C represents _______ of mitosis. A) anaphase B) meiosis C) metaphase D) prophase

C.metaphase

What is the part of the cell cycle process by which chromosomes in a cell nucleus are separated into two identical sets of chromosomes, each in its own nucleus? A) cytokinesis. B) meiosis. C) mitosis. D) telekinesis.

C.mitosis

When the sperm meets the egg during sexual reproduction, a zygote is formed. This single-cell zygote is the first step of a much more complex multi-cellular organism. Which statement describes the process the zygote undergoes immediately after fertilization? A) The zygote grows larger and begins to form new features. B) Cells begin to differentiate and form only the internal organs. C) Cells begins to differentiate to form a covering and internal organs. D) The zygote undergoes mitosis to create general, non-specialized cells.

D) The zygote undergoes mitosis to create general, non-specialized cells.

With the exception of gametes, all new somatic cells in all multicellular organisms are formed through the process of mitosis. What must occur with the DNA in the original cells in order for mitosis to make new cells? A) the DNA coils up and becomes invisible B) the DNA forces the production of water C) the DNA will mutate itself, based on the type of organism it is D) the DNA must replicate itself in order to make two exact copies

D) the DNA must replicate itself in order to make two exact copies

In multicellular organisms, life begins as a single cell until ___________ occurs, causing growth. A) conjugation B) fertilization C) meiosis D) mitosis

D. mitosis

nuclear envelope forms at each pole spindle dissolves chromosomes uncoil These processes occur during A) anaphase. B) metaphase. C) prophase. D) telophase.

D. telophase

During this process, the nucleus of a cell divides to form two nuclei that are identical to the original cell. A) cytokinesis B) interphase C) meiosis D) mitosis

D.mitosis

Which of these statements is true about plant and animal cells during the process of cell division? A) Both animal and plant cells develop a cell plate. B) Both animal and plant cells develop a cleavage furrow. C) Plant cells develop a cell plate while animal cells develop a cleavage furrow. D) Animal cells develop a cell plate while plant cells develop a cleavage furrow.

c. Plant cells develop a cell plate while animal cells develop a cleavage furrow.

The process of DNA replication occurs just before ______________. A) cytokinesis B) replication C) mitosis D) nucleosynthesis

c. mitosis

Mitosis results in A) two unique daughter cells. B) four unique daughter cells. C) two identical daughter cells. D) four identical daughter cells.

c. two identical daughter cells.

Which of these would BEST describe what would happen to a cell in a time where nutrients and water were in abundance? A) The cell's growth would speed up significantly, leading to longer periods of time between cell division. B) The cell's growth would slow down significantly, leading to longer periods of time between cell division. C) The cell's growth would speed up significantly, leading to shorter periods of time between cell division. D) The cell's growth would slow down significantly, leading to shorter periods of time between cell division.

c.The cell's growth would speed up significantly, leading to shorter periods of time between cell division.