List of top Biology Questions

Which disorder is caused by the substitution of Glutamic acid (Glu) by Valine (Val) at the sixth position of the beta globin chain of the hemoglobin?

Match List-I with List-II:

List-I (Disease)	List-II (Pathogen/Genera)
(A) Amoebiasis	(I) Wuchereria
(B) Filariasis	(II) Entamoeba histolytica
(C) Ringworm	(III) Haemophilus influenzae
(D) Pneumonia	(IV) Epidermophyton

Choose the correct answer from the options given below:

Which of the following equation is correct about Verhulst-Pearl Logistic Growth?

“Transforming Principle” was given by:

Which of the following is a recessive trait for garden pea plant?

In which of the following units is thickness of ozone layer measured?

Ex-situ conservation includes:

Which of the following gas is found in the Stratosphere?

Nucleosome is:

In a velvet grass seed, the cotyledon is called:

In which phase of the cell cycle does replication of DNA take place?

Which of the following represents a test cross in which half the offspring is heterozygous and half would be homozygous recessive?

A thermostable DNA polymerase is isolated from:

ELISA is based on the principle of:

Which one of the following is not a process of DNA recombinant technology?

In Hershey and Chase experiment, some viruses grew on medium that contained:

Who performed experiments on Vicia faba to prove that the DNA replicates semi-conservatively?

Adenine constitutes 0.16 mole fraction in a given single-stranded DNA. What is the mole fraction of uracil in the resultant RNA, if this entire DNA fragment is transcribed?

Humans are sexually reproducing and viviparous. The male reproductive system is composed of a pair of testes, the male sex accessory ducts, the accessory glands, and external genitalia. The female reproductive system consists of a pair of ovaries, a pair of oviducts, a uterus, a vagina, external genitalia, and a pair of mammary glands. The reproductive cycle of female primates is called the menstrual cycle. The menstrual cycle starts only after attaining sexual maturation (puberty). Coitus followed by fertilization leads to the formation of a zygote. After 9 months of pregnancy, the fully developed foetus is ready for delivery.

There is no natural habitat on earth known that is inhabited just by a single species. For any species, the minimal requirement is one more species on which it can feed. Even a plant species, which makes its own food, cannot survive alone and needs soil microbes to break down the organic matter in soil and return the inorganic nutrients for absorption. It is obvious that in nature, animals, plants, and microbes do not and cannot live in isolation but interact in various ways to form a biological community.

Choose the statements that are correct with respect to continuous culture systems:
(A) In a simple stirred tank bioreactor, stirring happens through sparging of air bubbles
(B) A bioreactor has an agitator system, oxygen delivery system, and foam control system
(C) Sampling ports provide vents to withdraw small volumes of culture periodically
(D) Culturing in bioreactors is classified as downstream processing
Choose the correct answer from the options given below:

In which of the following ecosystems, detritus food chain (DFC) is the major conduit for energy flow?

Tropical regions account for greater biological diversity because of the following reasons, except:

Deserts, rain forests, mangroves, coral reefs, wetlands, estuaries, and alpine meadows in India represent:

Match List-I with List-II:

List-I (Genes/Products)	List-II (Used in/for)
(A) C-Peptide	(I) Corn borer
(B) α-1-antitrypsin	(II) Rosie
(C) cryIAc	(III) Insulin
(D) α-lactalbumin	(IV) Emphysema