11. What term is used for a gene that exhibits multiple effects?
[A] Pleiotropism
[B] Multitropism
[C] Complementary
[D] Allele
Show Answer
Correct Answer: A [Pleiotropism]
Notes:
Pleiotropism describes the genetic effect of a single gene on multiple phenotypic traits. A classic example of pleiotropy is phenylketonuria, a human disease that affects multiple systems but is caused by one gene defect. The underlying mechanism is that the gene codes for a product that is, for example, used by various cells, or has a signaling function on various targets.
12. Which vitamin is also called as “Pantothenic acid”?
[A] Vitamin K
[B] Vitamin D
[C] Vitamin B3
[D] Vitamin B5
Show Answer
Correct Answer: D [Vitamin B5]
Notes:
Vitamin B5 is also called as Pantothenic acid and it was discovered by Roger J.Williams in 1933. Chemical formula for Vitamin B5 is C9H17NO5.
13. 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.
14. Branch of science dealing with the medicinal plants is known as__?
[A] Pharmacognosy
[B] Pharmacology
[C] Phenology
[D] None of these
Show Answer
Correct Answer: A [Pharmacognosy]
Notes:
Pharmacognosy is the study of drugs or raw drugs produced from natural sources such as plants, microbes, and animals. It involves the analysis of their biological, chemical, biochemical and physical properties.
15. Who among the following is considered to be the father of DNA?
[A] James Watson
[B] Hargobind Khurana
[C] Alec Jeffereys
[D] Leslie Orgel
Show Answer
Correct Answer: A [James Watson]
Notes:
James Dewey Watson is an American molecular biologist, geneticist, and zoologist. In 1953, he co-authored with Francis Crick the academic paper proposing the double helix structure of the DNA molecule.
16. The most abundant biomolecule on earth is__?
[A] Minerals
[B] Salts
[C] Carbohydrates
[D] Vitamins
Show Answer
Correct Answer: C [Carbohydrates]
Notes:
Carbohydrate is a biomolecule that is found in the most abundance on earth. Carbohydrates are mostly produced by green plant cells, algae and some bacteria.
17. Where does agar-agar come from?
[A] Gigartina
[B] Gelidium
[C] Gracillaria
[D] All the above
Show Answer
Correct Answer: D [All the above]
Notes:
Agar-agar is a jelly-like substance. It is a non-nitrogenous carbohydrate. It consists of two polysaccharides namely agarose and agaropectin. It is obtained from many red algae. For example, Gracilaria, Gelidium, Gigartinia.
18. Which of the following group is used to represent disease-related fungi?
[A] Penicillium
[B] Truffles, mushrooms and morels
[C] Smuts, rusts and moulds
[D] All of the above
Show Answer
Correct Answer: C [Smuts, rusts and moulds
]
Notes:
Smuts, rusts, and molds groups is used to represent disease-related fungi.
19. In bryophytes, antherozoids are__?
[A] Biflagellate
[B] Multiflagellate
[C] Sometimes biflagellate and sometimes multiflagellate
[D] Biflagellate in a few species and multiflagellate in the rest
Show Answer
Correct Answer: A [Biflagellate]
Notes:
Antheridium is a type of spherical male sex organ that produces dizygotic spermatozoa (antherozoid). Both flagellae are similar, apically fused, and are whiplash-type.
20. The condition of flowers in which all the filaments of the stamens join into a single bundle to form a tube-like structure but the anthers remain free is called__?
[A] Epipetalous
[B] Monadelphous
[C] Staminode
[D] Epiphyllous
Show Answer
Correct Answer: B [Monadelphous]
Notes:
The condition of flowers in which all the filaments of the stamens join into a single bundle to form a tube-like structure but the anthers remain free is called Monadelphous.
