Cell Cycle

Q.

Which phase corresponds to the interval between the mitosis and initiation of DNA replication?

a.)S-phase

​​​​​b.)M-phase

c.)G1 phase

d.) G2-phase

Q.

Can there be DNA replication without cell division?

Q.

What Is The Main Difference Between Mitosis And Cytokinesis?

Q.

What is the purpose of a Cell Cycle?

Q.

What is the correct sequence of different phases of the cell cycle?

Q.

Question 30.1
The following events occur during the various phases of the cell cycle. Name the phase against each of the events.
Disintegration of nuclear membrane

The following events occur during the various phases of the cell cycle. Name the phase against each of the events.
Appearance of nucleolus

The following events occur during the various phases of the cell cycle. Name the phase against each of the events.
Division of centromere

The following events occur during the various phases of the cell cycle. Name the phase against each of the events.
Replication of DNA

Q.

Question 23

It is observed that heart cells do not exhibit cell division. Such cells do not divide further and exit ... phase to enter an inactive stage called... of cell cycle. Fill in the blanks.

Q. After 4 cycles of PCR how many DNA molecules are formed from one DNA molecule?

1. 4
2. 32
3. 16
4. 8

Q. What is cell division? Write two types of cell division?

Q. What is the time taken by unicellular fungi to progress through cell cycle?

1. 24 hours
2. 1 hour
3. 30 minutes
4. 90 minutes

Q. Recombinant DNA technology involves several steps in specific sequence. Find out the correct sequence.

a. Fragmentation of DNA

b. Culturing the host cells in a medium at large scale

c. Ligation of DNA fragment into a vector

d. Extraction of the desired product

e. Isolation of DNA

f. Isolation of desired DNA fragment

g. Transferring the recombinant DNA into the host

1. e → a → f → g → c → b → d
2. e → f → a → c → g → b → d
3. e → a → f → c → g → b → d
4. a → e → c → f → g → d → b

Q. How does ORI decide the copy no. of a plasmid?

Q. Assertion :A piece of DNA inserted into an alien organism generally does not replicate if not inserted into a chromosome. Reason: Chromosomes have specific sequences called 'ori' region where DNA replication is initiated.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

What is the average cell cycle span for a mammalian cell?

Q. Cell cycle includes

1. DNA replication
2. cell growth
3. protein synthesis
4. all of these

Q. What is the ploidy of female gametophyte?

Q. Cell cycle includes

1. DNA replication
2. cell growth
3. protein synthesis
4. all of these

Q. What is the time taken by unicellular fungi to progress through cell cycle?

1. 24 hours
2. 1 hour
3. 90 minutes
4. 30 minutes

Q.

If a cell has twice as much DNA as in a normal functional cell it means that the cell:

1. Is preparing to divide

2. has completed division

3. has reached the end of its life span

4. has ceased to function

Q. The mitotic spindle is made of

1. Actin
2. microtubules
3. condensins
4. myosin

Q. The yeast cells fail to multiply in water but multiply rapidly in sugar solution. Give reason.

Q.

give reasons

1) Gametes are haploid number of chromosomes

Q. Explain the interphase of cell cycle with the help of a diagrammatic view.

Q. Match the terms to these definitions.
Centromere, centrosome, chromatin, chromosome, spindle, cell cycle, karyotype, meiosis, mitosis, sister chromatids, interphase, metaphase
.......... The period from the end of one division of a, cell to the end of the next division.

Q.

The most important reason for cell division to occur is:

1. To ensure that the daughter cells resemble each other as well as the parent in genetic content.

2. To ensure that both the daughter cells get the same number of organelles

3. To ensure that the nucleus is divided exactly in half

4. To ensure both the daughter cells receive the exact same amount of cytoplasm

Q. The life of all multicellular organisms through sexual reproduction starts as a ............

1. Egg
2. Zygote
3. Sperm cell
4. Haploid cell

Q. If a back cell take $20$ min to divide & if with this rate it take $10hrs$ . To fill a cup of cells. What time it will take to fill it half?

Q.

1. 24 hours
2. 42 hours
3. 24 minutes
4. 24 seconds

Q. How many division have to be occur to convert 56 haploid cells to gametes? And how can you explain me the process of meotic division in gameeta and their ploidy

Q. What is the time taken by unicellular fungi to progress through cell cycle?

1. 24 hours
2. 1 hour
3. 90 minutes
4. 30 minutes