Biology Mcqs

Exposure to low temperature stimulates plants to flower. This is called___________?

A. Photoperiodism
B. Thermotropism
C. Vernalisation
D. Thermoregulation

In Cx(H2O)y x ranges from______________?

A. 1 to 3 thousand
B. 3 to many thousand
C. 3 to 5 thousand
D. 5 to 9 thousand

The cells present in testes and secrete testosterone are___________?

A. Sertoli cells
B. Germinal cell
C. Interstitial cells
D. Spermatocyte

Glycolipids and glycoproteins have structural role in the ______________ matrix of animal and bacterial cell?

A. Extracellular
B. Intracellular
C. Both of these
D. Glucose

The type of learning in which there is loss or decrease in response to repeated stimuli?

A. Imprinting
B. Habituation
C. Latent learning
D. Insight learning

Keto group is represented as___________?

A. CO
B. C-COO-C
C. HCOH
D. HOH

Sleep movements are a type of___________?

A. Turgor movements
B. Growth movements
C. Tactic movements
D. Paratonic movments

How many carbon atoms are required to form a furan ring (ribofuranose)_____________?

A. 3
B. 4
C. 5
D. 2

In esterification OH comes from_______________?

A. Organic acid
B. Alcohol
C. Water
D. Sugar

Which one of the following is most likely to occur in an animal during winter?

A. Activation of sweat glands
B. Dilation of skin blood vessels
C. Panting
D. Thermogenesis