List of top Zoology Questions

Assertion (A): Mast cells secrete serotonin.
Reason (R): Vasodilators cause inflammation in response to infection.

Choose the incorrect statements regarding Hirudinea

• A. Male reproductive system has cirrus.
• B. They are exclusively marine and tubicolous.
• C. Fertilization is external and development is direct.
• D. Clitellum is conspicuous during the breeding season only.

Identify the correct option
Statement I: Haemoglobin binds with oxygen in oxygen-rich areas and leaves CO2.
Statement II: Haemoglobin is an amphoteric compound.

Find out the correct match Set I A. Carbohydrates
B. Proteins
C. Fats
D. Nucleic acids
Set II i. Nucleosides, Phosphates
ii. Glucose, Fructose, Galactose
iii. Amino acids
iv. Fatty acids, glycerols

One of the following is not a second messenger in hormone action:

Identify the correct match of the gland with its respective hormone and its function.

Assertion (A): Pneumaticity of bones is the unique feature of reptiles.
Reason (R): Air sacs associated with lungs of birds facilitate continuous oxygenation of blood.

Assertion (A): Life cycle of ectoparasites is more complex with many developmental stages.
Reason (R): Developmental stages of endoparasites have better chances to reach definitive host.

Among the following, nocturnal periodicity is exhibited by

Hyaline cartilage occurs in

• A. Sternal part of the ribs.
• B. Pubic Symphysis.
• C. Epiphyseal plate.
• D. Vocal chords.
• E. Epiglottis.
• F. Endoskeleton of cyclostomes.

In microtubules, the peripheral doublets are interconnected by linkers called

Arrange in sequence the following events related to the mechanism of hearing:

• Hair cells bend and press against Tectorial membrane.
• The induction of ripple in basilar membrane.
• Eardrum vibrates in response to sound waves.
• Impulses transmitted to brain.
• Transmission of vibrations through ear ossicles.

Identify the correct option: Statement-I (S-I): Test tube baby undergoes development within the test tube.
Statement-II (S-II): In IVF-ET method, fertilization occurs inside the body.

The notochordal mesoderm induces the overlying ectodermal cells that are involved in the formation of:

The double-layered fold of peritoneum that connects the ovary with the wall of the abdominal cavity is:

In Multiple Ovulation and Embryo Transfer method, the stage at which the embryos are transferred to the surrogate mother is:

Scientist associated with DNA sequencing is:

One of the following is not a part of light band of myofibril.

Identify the structure found in the early embryonic stages of amniotes that provides a clue to their aquatic ancestry.

The connecting link between reptiles and mammals is:

Among the following the incorrect pair is:

The universal donor blood group is:

Assertion (A): Mary Mallon was nicknamed as 'Typhoid Mary'.
Reason (R): Mary Mallon spread typhoid for several years through the food she prepared.