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WorksheetsCell Division
Total questions: 15
Worksheet time: 10mins
“The cell's DNA replicates”. This event occurs in cell cycle during
M phase
G1 phase
S phase
G2 phase
Which of the following statement is FALSE about the cell cycle?
Development of spindle fibers occur in G2
The cell spends the most amount of time in G2 phase
G1 is the longest time taken in the cell cycle of most cells
G1 is the time when the cell increases in size
Interphase is the part of the cell cycle when ___________.
a cell ceases to function
a germ cell forms its spindle apparatus
a cell grows and replicates its DNA
mitosis proceeds
Which of the following is not a stage of mitosis?
Prophase
interphase
metaphase
anaphase
Synthesis of proteins take place in ______________.
G1 phase
S phase
karyokinesis
cytokinesis
Which of the following is 'the behaviour of the chromosome' during mitosis?
Early mitotic spindle formed from the centrosomes
Nuclear envelope disappears
Sister chromatids separate from each other to the poles of the cells
Two cells formed by formation of cleavage furrow
All of the following occur during prophase of mitosis in animal cells EXCEPT
The centrioles move toward opposite poles
Chromosomes are duplicated
The nucleolus can no longer be seen
The spindle is organized
The significance of mitosis in human are:
I. Asexual reproduction
II Repair of damaged tissue
III. Growth
IV. Gamete production
I only
II and IV
I and IV
II and III
Which of the following statements is NOT TRUE?
Mitosis produces new nuclei with exactly the same chromosomal number as the parent nucleus
Mitosis produces genetically non identical daughter cells as the parent cell
Mitosis and cytokinesis are required for asexual reproduction
The mitotic spindles in eukaryotic cells are composed of microtubules
Cytokinesis usually, but not always, follows mitosis. If a cell completed mitosis but not cytokinesis, the result would be a cell with
A single large nucleus
Two nuclei but with half the amount of DNA
Two nuclei
High concentrations of actin and myosin
When pairs of homologous chromosomes separate during anaphase I,
The sister chromatids remain linked to one another
The maternal chromosomes all move to one daughter cell, and the paternal chromosomes cell. all move to the other daughter cell
The genetic composition remain the same
Centromere splits
All of the following are functions of meiosis in plants EXCEPT
Production of spores
Reduction of chromosome number by half
Production of identical daughter cells
Independent assortment of chromosomes
Which of the following statements about crossing over is INCORRECT?
Crossing over combines sections of the maternal and paternal chromosomes
Crossing over plays a role in both sexual and asexual reproduction
There are on average one to three crossover events per chromosome
Crossing over increases the extent of genetic variation beyond what is possible through independent assortment alone
Which of these statements is FALSE?
In humans, each of the 22 maternal autosomes has a homologous paternal chromosome
In humans, the 23rd pair, the sex chromosomes, determines whether the person is female or male
Single, haploid set of chromosomes in ovum and sperm unite during fertilization, forming a diploid, single celled zygote
At sexual maturity, ovaries and testes produce diploid gametes by meiosis.
Which the following is TRUE about meiosis?
I. Meiosis occurs to form gametes
II. The genetic constitution of the daughter cells is the same
III. The number of chromosomes is reduced by half
IV. Two daughter cells are formed at the end of the process
I, II and III
I and III
II and IV
IV only
