List of top Biology Questions

Assertion (A): Isolated single cells can be fused to produce somatic hybrids.
Reason (R): Cells selected for somatic hybridisation have desirable characters.
Assertion (A): In humans, filariasis is characterized by inflammation of the lower limbs.
Reason (R): Filarial worm usually lives in the lymphatic vessels of the lower limbs.
Some of the important goals of HGP are given below. Choose the correct goal of HGP.
Human Immunodeficiency Virus is a member of the group of viruses known as:
In a DNA, the percentage of thymine is 20. What is the percentage of guanine in it?
Select the statements that are true for the embryo of the flowering plants from the given options:
1. The zygote forms a proembryo and subsequently heart-shaped, globular and mature embryo.
2. Most zygotes divide to form embryo only after a certain amount of endosperm is formed.
3. The embryo develops at the micropylar end of the embryo sac.
4. A typical dicotyledonous embryo consists of an embryonal axis and a scutellum.
Choose the correct option from the following:
Given below are few statements with reference to the human male reproductive system:
1. Paired seminal vesicles, prostate gland and bulbourethral gland constitute the male accessory glands.
2. Secretions of the male accessory glands constitute the seminal plasma.
3. Secretions of the bulbourethral glands help in the lubrication of the penis.
4. Enlarged end of the the penis is known as foreskin.
5. Seminal plasma is rich in fructose, calcium and certain enzymes.
Choose the option with all true statements from the given options:
Inheritance of which of the following traits is shown in the cross given below?

Autosomal recessive trait

Choose the correct option from the following:
When a pure tall pea plant (\textit{Pisum sativum}) with green pod is crossed with a dwarf pea plant with yellow pod, how many dwarf pea plants, out of 16, will be produced in the F\textsubscript{2 generation?}
ICBN refers to?
Which of the following statements are correct with respect to the inflorescence in Cotoneaster?
Nitrogen base not present in DNA:
Identify the type of flowers based on the position of calyx, corolla and androecium with respect to the ovary from the given figures (a) and (b).
Identify the type of flowers based on the position of calyx, corolla and androecium with respect to the ovary
Which of the following controls/control the growth of bollworms?
The common approach(es) for the treatment of cancer is/are:
(A) Vaccination
(B) Surgery
(C) Physiotherapy
(D) Radiation therapy
(E) Immunotherapy
Choose the correct answer from the options given below:
The size of VNTR varies from:
When one of the parents has ‘A’ blood group and the other parent has ‘O’ blood group, then their child can have _______ blood group.
The method where an ovum is transferred from a donor into the fallopian tube of another female is:
Given below are two statements:
Statement I: In a bioreactor, small volumes of cultures are developed where useful bio products are produced.
Statement II: In downstream processing, products formulated with preservatives are ready for marketing without quality testing.
Choose the correct answer from the options given below:
Who proposed that the first form of life could have come from pre-existing non-living organic molecules?
In diploid organisms, which of the following undergoes meiosis?
Which one is the correct example of hermaphrodites?
Which one of the following is not associated with megasporangium?
Match List-I with List-II:
List-I (Recent Extinction)List-II (Place)
(A) Dodo(I) Africa
(B) Quagga(II) Russia
(C) Thylacine(III) Mauritius
(D) Steller’s Sea Cow(IV) Australia
Choose the correct answer from the options given below:
Which of the following statements is not correct for Restriction enzymes?