NTSE Biology Chemical and Coordination MCQs

Question: Glucagon is secreted from which cells of Islet of langerhans

• a) α Cells
• b) β Cells
• c) λ Cells
• d) Both α and β cells

Answer: α Cells

Question: Which of the following hormone is responsible for the emotional state as fear, anger, pain & cause rise of blood pressure & rate of heart beat ?

• a) Insulin
• b) Adrenaline
• c) Progesterone
• d) Thyroxin

Answer: Adrenaline

Question: What is the effect of thyroxin on BMR

• a) Increase
• b) Decrease
• c) Uncertain
• d) Maintain

Answer: Maintain

Question: Ovulation in humans is controlled by

• a) FSH & LTH
• b) FSH & TSH
• c) LTH & LH
• d) FSH & LH

Answer: FSH & LH

Question: Leuteinsing hormone in female

• a) Helps in the appearance of secondary sexual characters.
• b) Stimulates ovary to secrete estrogen
• c) Helps in release of the ovum from the ovary
• d) Control of blood pressure

Answer: Helps in release of the ovum from the ovary

Question: Hormones are the chemical produced in our body by

• a) Enzymes
• b) Liver
• c) All the glands
• d) Endocrine glands

Answer: Endocrine glands

Question: Progesterone is secreted by

• a) Corpus luteum
• b) Thyroid
• c) Thymus
• d) Testis

Answer: Corpus luteum

Question: The gland which is exocrine and endocrine is -

• a) Adrenal
• b) Pituitary
• c) Pancreas
• d) Liver

Answer: Pancreas

Question: Plants grown in total darkness lack chlorophyll and thus appear white or yellow. What is this type of growth known as ?

• a) Etiolation
• b) Heterotrophic
• c) Stuntism
• d) Euploid growth

Answer: Etiolation

Question: Term ‘Hormone’ was conined by

• a) Karl Landsteiner
• b) Bayliss and starling
• c) Louis Pasteur
• d) F.W. Went

Answer: Bayliss and starling

More Questions..............

Question: Chemical transmission of nerve impulse from one neuron to another at a synapse is carried by

• a) Cholesterol
• b) Acetylcholine
• c) Cholecystokinin
• d) ATP

Answer: Acetylcholine

Question: What are parthenocarpic fruits ?

• a) Fruits enclosed in pods such as pea
• b) Fruits formed without fertilization
• c) Very hard fruits
• d) Fruits with more than one seed at their centre

Answer: Fruits formed without fertilization

Question: In autumn leaf fall occurs because

• a) of formation of abscission layer at the bases
• b) leaf becomes heavy
• c) leaf does not remain green
• d) of low temperature

Answer: of formation of abscission layer at the bases

Question: Gibberellins cause

• a) elongation of internodes
• b) curvature of coleoptile
• c) cell division
• d) initiation of lateral roots

Answer: elongation of internodes

Question: What are pathenocarpic fruits ?

• a) ABA
• b) Auxin
• c) None of the above
• d) Both A and B

Answer: ABA