As a cell becomes larger, its
surface area increases faster than its volume
surface area stays the same, but its volume increases
volume increases faster than its surface area
volume increases, but its surface area stays the same
If the surface area of a cell that is shaped like a cube increases 100 times, its volume increases about
1000 times
10 times
5 times
100 times
All of the following are problems that growth causes for cells EXCEPT
more demands on DNA
expelling wastes
excess oxygen
obtaining enough food
Compared to small cells, large cells have more trouble
dividing
moving needed materials and waste products out
producing daughter cells
storing needed materials and waste products
After cell division, each daughter cell has
a lower surface area/volume ratio than the parent cell
a higher surface area/volume ratio than the parent cell
less DNA in its nucleus than the parent cell
more DNA in its nucleus than the parent cell
A multicellular organism begins life as a single cell—a fertilized egg with a complete set of chromosomes. The picture in Figure 10–2 above shows how the cell divides to become two cells, then four cells, eight cells, and so on. Which of the following statements best describes what happens during this process?
Chromosomes are divided evenly during cell division so that each new daughter cell has an equal share of the original set.
Chromosomes are randomly distributed during cell division so that some new cells have partial sets while others have complete sets.
Chromosomes are duplicated before cell division so that each new daughter cell has a complete set.
Chromosomes are stored in the original cell to direct the division of all daughter cells, which do not have their own chromosomes.
Which pair includes a phase of the cell cycle and a cellular process that occurs during that phase?
M phase, cell growth
G1 phase, DNA replication
S phase, cell division
G2 phase, preparation for mitosis
When during the cell cycle is a cell’s DNA replicated?
S phase
G1 phase
M phase
G2 phase
In Figure 10–4, what role does structure A play in mitosis?
dissolve nuclear envelope
increase cell volume
replicate DNA
connect to spindle fibers
The structure labeled A in Figure 10–5 is called the
spindle
centriole
centromere
sister chromatid
The structures labeled B in Figure 10–5 are called
sister chromatids
centromeres
spindles
centrioles
During which phase(s) of mitosis are structures like the one shown in Figure 10–5 visible?
prophase, metaphase, and anaphase
metaphase only
anaphase only
anaphase and interphase
One difference between cell division in plant cells and in animal cells is that plant cells have
chromatin
a cell plate
The process by which a cell divides into two daughter cells is called
mitosis
metaphase
cell division
interphase
An advantage of sexual reproduction over asexual reproduction is that sexual reproduction
requires more time
takes less time
produces identical offspring
provides genetic diversity
Which of the following is a correct statement about the events of the cell cycle?
DNA replicates during cytokinesis.
The M phase is usually the longest phase.
Interphase consists of the G1, S, and G2 phases.
Little happens during the G1 and G2 phases.
Cell division is represented in Figure 10–3 by the letter
A
B
C
D
First phase of mitosis is called
Metaphase
Prophase
Anaphase
Telophase
During which phase of mitosis do the chromosomes line up along the middle of the dividing cell?
Which of the following represents the phases of mitosis in their proper sequence?
prophase, metaphase, anaphase, telophase
interphase, prophase, metaphase, anaphase, telophase
prophase, anaphase, metaphase, telophase
interphase, prophase, metaphase, telophase
What is the role of the spindle fibers during mitosis?
They duplicate the DNA.
They make the chromosomes visible.
They break down the nuclear membrane.
They help separate the chromosomes.
The two main stages of cell division are called
mitosis and cytokinesis.
synthesis and cytokinesis.
the M phase and the S phase.
mitosis and interphase.
During normal mitotic cell division, a parent cell that has four chromosomes will produce two daughter cells, each containing
16 chromosomes
8 chromosomes
4 chromosomes
2 chromosomes
Which of the following explains why body cells would undergo mitotic cell division?
double chromosome number
reproduction and apoptosis
cut chromosome number in half
growth and repair
The structure shown in Figure 10–5 is a replicated chromosome.
The smaller a cell is, the more difficult it is for the cell to move enough nutrients and wastes across its cell membrane to maintain its normal functions.
In eukarotes, the spindle breaks down during prophase and re-forms during telophase.
Typically, the longest phase of mitosis is anaphase.
The cell shown in step E in Figure 10-7 above is undergoing telophase.
The number of sister chromatids in a human body cell that is entering cell division is .
A cell that has 5 chromosomes in the G1 phase will have chromatids in the G2 phase.
The structure labeled A in Figure 10–8 is called the Cell Plate Centromere Spindle Fiber Centriole( Cell Plate, Centromere, Spindle Fiber, Centriole ).
Bitte warte - es wird geladen…