Cell Cycle and Cell Division - Online Test
Q1. Plants show mitotic divisions in -------------
Answer : Option C
Explaination / Solution:
The plants can show mitotic divisions in both haploid and diploid cells due to alternation of generations in life cycle.
Q2. What is the average cell cycle span for a mammalian cell?
Answer : Option D
Explaination / Solution:
All the phases of cell cycle in mammalian cell are completed in 24 hours.
Q3. The number of chromosome and the amount of DNA are changed in
Answer : Option A
Explaination / Solution:
S phase marks the period during which DNA synthesis or replication takes place. During this time the amount of DNA per cell doubles. If the initial amount of DNA is denoted as 2C then it increases to 4C.and even in anaphase the chromosome numbers are changed.1
Q4. In yeast the cell cycle is progressed through
Answer : Option D
Explaination / Solution:
Yeast can progress through the cell cycle in only about 90 minutes due to its simple organisation.
Q5. M phase represents
Answer : Option B
Explaination / Solution:
The M Phase represents the phase when the actual cell division or mitosis occurs/starts during cell cycle.
Q6. How many chromosomes are present in each cell of onion root tip?
Answer : Option A
Explaination / Solution:
Onion root tip cells have 16 chromosomes in each cell, same as the number of chromosomes in somatic cells.
Q7. In animal cells, during G2 phase
Answer : Option B
Explaination / Solution:
During the G2 phase, proteins and RNA are synthesised in preparation for mitosis while cell growth continues.
Q8. The resting phase is otherwise called as
Answer : Option D
Explaination / Solution:
The interphase, though called the resting phase, is the time during which the cell is preparing for division by undergoing cell growth in an orderly manner. No divisional activities occur during this phase. Hence the name.
Q9. In animal cells, the mitotic division is seen in
Answer : Option B
Explaination / Solution:
In animals, mitotic cell division is only seen in the diploid somatic cell since mitosis produces cells with same number of chromosomes as that of parents.
Q10. In which stage, the cells remain metabolically active but do not proliferate?
Answer : Option C
Explaination / Solution:
In Go stage the cells are in a metabolically active state but do not divide unless there are some abnormal genes which reverses the same. This stage is also called quiscent stage. Examples human nerve cells.
