Basic Zoology Questions and Answers
Practice ModeShowing 10 of 98 questions
Q21
The functional unit of contractile system in striated muscle is-
Answer: Option B
Q22
Globular proteins undergo structural changes in response to extremes of pH or temperature, is called-
Answer: Option B
Explanation: Changes occurring to molecules of globular proteins and nucleic acid in solution in response to extremes of pH or temperature is called denaturation.
Q23
The study of relationships between size and shape is known as-
Answer: Option A
Explanation: Allometry is the study of relationship between size and shape. Organisms do not grow isometrically, rather proportions change as size changes.
Q24
A localised tumour covered by connective tissue is called-
Answer: Option C
Q25
Hürthle cell is associated with-
Answer: Option A
Explanation: Hürthle cell is benign or malignant tumour of the thyroid gland. The cells are large and acidophilic.
Q26
A metastatic cancerous tumour is termed ‘sarcoma’, if the disorder is in-
Answer: Option C
Explanation: Sarcomas are cancer of connective tissues. Fibroblast is the characteristic cell type of vertebrate connective tissue.
Q27
Graft between isogenic individuals is known as-
Answer: Option A
Explanation: Syngraft is also known as isograft. It is a kind of grafting between isogenic individuals such as identical twins.
Q28
The most striking example of point mutation is found in a disorder called-
Answer: Option D
Explanation: Point mutations involve minor changes in the genetic material, often single base-pair substitution. Sickle-cell anaemia is genetically determined disorder, caused by homozygosity, producing a single amino acid substitution in the b-chain of the normal haemoglobin molecule.
Q29
The phenomenon of ‘industrial melanism’ demonstrates-
Answer: Option A
Explanation: Industrial melanism provides one of the best examples of evolution within species and of natural selection.
Q30
Overproduction of which of the following neurotransmitter has been associated with the mental disorder ‘Schizophrenia’ ?
Answer: Option C
Explanation: Dopamine is a neurotransmitter whose low concentration produces symptoms of Parkinson’s disease and over production causes Schizophrenia.