1. In genetics, the Reverse transcriptase helps in which among the following transcriptions?
[A] Single stranded DNA into double stranded DNA
[B] Single stranded RNA into double stranded DNA
[C] Single Stranded RNA into double stranded RNA
[D] Double Stranded DNA into single stranded RNA
Show Answer
Correct Answer: B [Single stranded RNA into double stranded DNA]
Notes:
Reverse transcriptase helps in Single Stranded RNA into double stranded RNA transcriptions. Reverse transcriptase (RT), also known as RNA-dependent DNA polymerase. It is used to generate complementary DNA (cDNA) from an RNA template.
2. Corpus Callosum makes an important part of which among the following organs in Human body?
[A] Brain
[B] Liver
[C] Kidney
[D] Spinal Chord
Show Answer
Correct Answer: A [Brain]
Notes:
The corpus callosum is a large, C-shaped nerve fiber bundle which is found beneath the cerebral cortex. It stretches across the midline of the brain. IT connects the left and right cerebral hemispheres.
3. Leishmaniasis is a disease caused by protozoan parasites that belong to the genus Leishmania and is transmitted by the bite of certain species of_________?
[A] Mosquito
[B] Sand fly
[C] Bee
[D] None of the above
Show Answer
Correct Answer: B [Sand fly]
Notes:
Leishmaniasis is a disease caused by protozoan parasites that belong to the genus Leishmania and is transmitted by the bite of certain species of Sandflies. The disease can present in three main ways: cutaneous, mucocutaneous, or visceral.
4. Which among the following is found in a Bacteriophage?
[A] only RNA
[B] only DNA
[C] Both RNA & DNA
[D] Either RNA or DNA
Show Answer
Correct Answer: D [Either RNA or DNA]
Notes:
Either RNA or DNA is found in a Bacteriophage. A bacteriophage which is also informally known as a phage, is a virus that infects and replicates within bacteria and archaea.
5. Bubo bubo is the scientific name of which of the following species?
[A] Hen
[B] Peacock
[C] Eagle
[D] Owl
Show Answer
Correct Answer: D [Owl]
Notes:
Bubo bubo is the scientific name of owl. The Bubo bubo or the Eurasian eagle-owl is a species of eagle-owl that resides in much of Eurasia.
6. A treatment with which among the following plant hormones would prevent water loss from the plant leaves, by reducing transpiration, in times of low water availability?
[A] Ethylene
[B] Abscisic Acid
[C] Gibberelic Acid
[D] Auxin
Show Answer
Correct Answer: B [Abscisic Acid]
Notes:
A treatment with abscisic acid would prevent water loss from the plant leaves, by reducing transpiration, in times of low water availability.
7. Penicillin’ which is used as an antibiotic is obtained from :
[A] Bacteria
[B] Fungi
[C] algae
[D] Lichens
Show Answer
Correct Answer: B [Fungi]
Notes:
Penicillin is derived from the mold Penicillium, specifically Penicillium chrysogenum. Discovered by Alexander Fleming in 1928, it was the first true antibiotic and revolutionized medicine by effectively treating bacterial infections. Its use importantly reduced mortality rates from bacterial diseases during and after World War II.
8. Taxonomically, which among the following is closet to Sea Corals?
[A] Sea Lettuce
[B] Sea Horse
[C] Sea Anemone
[D] Sea Urchin
Show Answer
Correct Answer: C [ Sea Anemone]
Notes:
As cnidarians, sea anemones are related to corals, jellyfish, tube-dwelling anemones, and Hydra.
9. The mosquito fern or Azolla is used as a biofertiliser because it__:
[A] Multiplies very fast to produce massive biomass
[B] Has association of nitrogen-fixing Rhizobium bacteria
[C] Has association of nitrogen fixing bluegreen algae
[D] Has association of mycorrhiza
Show Answer
Correct Answer: C [ Has association of nitrogen fixing bluegreen algae]
Notes:
Azolla, also known as mosquito fern, is used as a biofertilizer because it has a symbiotic relationship with nitrogen-fixing cyanobacteria. The cyanobacteria, Anabaena azollae, lives on the leaves of Azolla and can fix atmospheric nitrogen. This nitrogen-fixing ability increases the fertility of the soil and enhances crop yields.
Azolla is a small aquatic fern that grows on the surface of water or moist soil. It is used as a biofertilizer for rice in Asia. Azolla can be grown as a green manure before transplanting rice or as an intercrop with the rice. Both practices are reported to increase the growth and yield of rice.
Azolla is also used as animal feed, human food, medicine, and water purifier.
10. Which vitamin is also called as retinol?
[A] Vitamin A
[B] Vitamin C
[C] Vitamin D
[D] Vitamin K
Show Answer
Correct Answer: A [Vitamin A]
Notes:
Vitamin A is also called as retinol deficiency of which results in xeropthalmia. Chemical formula for Vitamin A is C20H30O.
