In an inducible operon, the genes are
In an inducible operon, the genes are
Options
(a) Always expressed (b) Usually not expressed unless a signal turns them “on” (c) Usually expressed unless a signal turns them “off” (d) Never expressed
Questions
For its action, nitrogenase requires
For its action, nitrogenase requires
Options
(a) Mn²⁺ (b) light (c) high input of energy (d) super oxygen radicals
Correct Answer:
high input of energy
Explanation:
Nitrogenases are enzymes used by some organisms […]
Polyethylene glycol method is used for
Polyethylene glycol method is used for
Options
(a) biodiesel production (b) seedless fruit production (c) energy production from sewage (d) gene transfer without a vector
Correct Answer:
gene transfer without a vector
Explanation: […]
The letter T in T -lymphocyte refers to
The letter T in T -lymphocyte refers to
Options
(a) Thalamus (b) Tonsil (c) Thymus (d) Thyroid
Correct Answer:
Thymus
Explanation:
No explanation available. Be the first to write the explanation for this […]
Peripatus is a connecting link between:
Peripatus is a connecting link between:
Options
(a) Mollusca and Echinodermata (b) Annelida and Arthropoda (c) Coelenterata and Porifera (d) Ctenophora and Platyhelminthes
Correct Answer:
Annelida and Arthropoda
Explanation:
No explanation available. Be […]
Frogs differ from humans in possessing:
Frogs differ from humans in possessing:
Options
(a) paired cerebral hemispheres (b) hepatic portal system (c) nucleated red blood cells (d) thyroid as well as parathyroid
Correct Answer:
nucleated red blood cells
Explanation:
Human […]
During muscle contraction in humans the
During muscle contraction in humans the
Options
(a) Actin filaments shorten (b) Sarcomere does not shorten (c) A band remain same (d) A, H and I bands shorten
Correct Answer:
A band remain same
Darwin’s finches are a good example of:
Darwin’s finches are a good example of:
Options
(a) Industrial melanism (b) Connecting link (c) Adaptive radiation (d) Convergent evolution
Correct Answer:
Adaptive radiation
Explanation:
No explanation available. Be the first to write […]
Apomictic embryos in citrus arise from
Apomictic embryos in citrus arise from
Options
(a) Synergids (b) Maternal sporophytic tissue in ovule (c) Antipodal cells (d) Diploid egg
Correct Answer:
Maternal sporophytic tissue in ovule
Explanation:
Apomixis is an asexual […]
What is common to whale, seal and shark?
What is common to whale, seal and shark?
Options
(a) Thick subcutaneous fat (b) Convergent evolution (c) Homoiothermy (d) Seasonal migration
Correct Answer:
Convergent evolution
Explanation:
No explanation available. Be the first to […]