#Question id: 23394
#General Aptitude
#Question id: 7764
#Unit 5. Developmental Biology
Cellular senescence
may have evolved to protect organisms against cancer. Instead of dividing out
of control, the cells die. Cellular senescence appears to be regulated by
several tumor suppressor genes, especially p53.what is the most appropriate
reason behind this,
1) Transcription
factor p53 is thought to suppress tumorigenesis by causing cell arrest and
senescence in response to short telomeres, DNA damage, and viral or external
signals to divide
2) This factor can
stop the cell cycle, cause cellular senescence in rapidly dividing cells,
instruct genes to initiate cellular apoptosis, and activate DNA repair enzymes.
3) Induction of apoptosis or cellular senescence by p53 always beneficial.
#Question id: 8852
#Unit 9. Diversity of Life Forms
The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the corresponding bones in whales have very different shapes and proportions. However, genetic data suggest that all three kinds of organisms diverged from a common ancestor at about the same time. Which of the following is the most likely explanation for these data?
#Question id: 714
#Unit 1. Molecules and their Interaction Relevant to Biology
What is the length of a polypeptide with 100 amino acids residue in a single contiguous alpha helix?
#Question id: 10304
#Unit 6. System Physiology – Plant
Pyruvate is coverted into the Acetyl-CoA, Acetyl-CoA contain the acetyl group which are comes from the pyruvate and Coenzyme A (CoA) that contain other groups such as;
a) A reactive thiol (—SH) group that is critical to the role of CoA as an acyl carrier in a number of metabolic reactions
b) contain pantothenic acid, A hydroxyl group of pantothenic acid is joined to a modified ADP moiety by a phosphate ester bond
c) pantothenic acid carboxyl group is attached to β-mercaptoethylamine in amide linkage
d) Hydroxyl group at the 3’ position of the ADP moiety has a phosphoryl group not present in free ADP
which of the following correct observation about Coenzyme A (CoA)?