- Which is incorrect about the somatic cells?
a. Reproduce for growth
b. Reproduce for repair
c. Reproduce for replacement
d. All are true - Which one of the following is longest in duration?
a. G1 Phase
b. G2 Phase
c. S Phase
d. M Phase - What is incorrect about the homologous chromosomes?
a. Have information about the same traits
b. These are identical in every aspect
c. One homologous chromosome from each pair inherited from each parent
d. Diploid individuals have two while germs cell have one of the homologous pair - What is incorrect about the sister chromatids?
a. After M Phase each chromosome has one sister chromatid
b. Duplication of chromatids occurs in the S phase
c. Both sister chromatids are exactly similar and identical
d. All are true - Normally a diploid human cell contains ________chromatids after interphase?
a. 23
b. 46
c. 92
d. Always 46 - Which one is not a part of chromosomes?
a. DNA
b. Proteins
c. RNA
d. All are present - The histones?
a. Positively charged proteins
b. Perform a very important role during chromosomal condensation
c. Each nucleosome core contains 8 histones
d. All - Which one histone is not present in the core?
a. H1
b. H2A
c. H2B
d. All present - The sister chromosome held together by a protein complex?
a. Cyclin
b. Cohesin
c. Kinetochore
d. Histone - Equatorial plane is ______?
a. Physical site
b. Imaginary plane
c. Prophase Alignment of chromosomes
d. Near one end of a pole - The cohesin breakdown occurs in___________________?
a. Prophase
b. Metaphase
c. Anaphase
d. Telophase - The cohesin breakdown occurs by__________?
a. Microtubules
b. Enzymatically
c. Physically
d. Not dismantles at all - The cleavage furrow in animal cells is formed by contraction of?
a. Microtubules
b. Kinetochores
c. Actin
d. Tubulin - How many checkpoints in mitosis?
a. 1
b. 2
c. 3
d. 4 - Which one is incorrect about the G1 checkpoint of mitosis?
a. Lead to replication of chromosomes
b. G0 cells leave this checkpoint
c. Both
d. None - Which one is not a checkpoint during the cell cycle?
a. G1 Checkpoint
b. Go Checkpoint
c. G2 Checkpoint
d. M Checkpoint - Which one does not alter DNA and affects the normal division process?
a. UV rays
b. Chemicals
c. Viral exposures
d. All affect by mutations - The Proto-oncogenes affect mitosis by ___________________?
a. Encoding cell division stimulating proteins
b. Blocked the activity of kinetochores
c. Disturbs chromosomal condensation
d. Dismantles nuclear envelope - Gene p53 affects the _ checkpoint?
a. G1
b. G2
c. G0
d. M - Tumor-suppressor genes normally?
a. Uncontrolled division
b. Turnoff division in healthy cells
c. Disturbs normal division
d. Enhance the effect of proto-oncogenes - What is incorrect about germ-line cells?
a. Diploid like somatic
b. Reserved for the purpose of reproduction
c. Only cells in which meiosis occurs
d. A special group of vegetative cells - The synapsis if formed during?
a. Leptotene
b. Zygotene
c. Pachytene
d. Diakinesis - The chiasmata stage results in;
a. Leptotene
b. Zygotene
c. Pachytene
d. Diakinesis - Meiosis in plants occurs during the formation of _?
a. Male gametophyte
b. Female gametophyte
c. Spores
d. Both a & b - The meiosis occurs in the honey bees in ________.
a. Queens
b. Drones
c. Occurs in both
d. Not in both
Note: One thing to keep in mind is that if you want to get some benefit, you have to solve the Quiz first, and then you have to look at the key given below.