CSIR Life Science Sample Questions (Part 1 of 10)
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- Which amino acid is involved in purine biosynthesis
- Glycine
- aspartate
- glutamine
- all the above
- Carbonic acid (H2CO3) ionizes partially in water to form bicarbonate (HCO3-) and H + . What will happen to a solution containing these ions when a small amount of a strong base is added
- More of the (H2CO3) will ionize to form (HCO3-)
- More of the (HCO3-) will combine with H + to form (H2CO3)
- Nothing will change
- all the above
- Which of the following leads to the decrease in the fluidity in the lipid bilayer
- An increase in the unsaturation of the phospholipid fatty acyl chains
- Decrease in the amount of cholesterol in bilayer
- Increase in the temperature of the bilayer
- An increase in the length of fatty acid chain
- Na + K + ATPase and SERCA pumps are inhibited by
- Tetrodotoxin
- Dendrotoxin
- Vandate
- Bungarotuxin
- TH cell is distinguished from Tc cell by the presence of which type of glycoprotein on their surface?
- Presence of CD4
- Absence of CD4
- Presence of MHC-I on the TH cell
- None of these
- The first Antibody synthesized by the Neonate?
- lg G
- lg A
- lg M
- Ig E
- In DNA structure ‘propeller trait’ means
- two bases orient antiparallel to each other
- two bases flip with respect to each other
- the bases of DNA base pairs twist with respect to each other
- two bases stock with respect to each other with 3.4 Å
- Rifampicin resistant mutarts of E. Coli were obtained in an experiment. Which of the following is the most likely to have undergone a mutation
- amino-acyl t-RNA synthetase
- Sigma factor of RNA polymerase
- Beta subunit of RNA polymerase
- Alpha subunit of RNA polymerase
- The egg of frog is
- Telolecithal
- Microlecithal
- Centrolecithal
- Alecithal
- The nature of endosperm in coconut is
- Cellular
- Helobial
- Nucellar
- All of these