CBSE 11TH BIOLOGY - Online Test
Q1. The stage of inactivation of cell cycle due to non-availability of mitogens and energy rich compounds is called
Answer : Option B
Explaination / Solution:
It is the stage of cell cycle during which the cells remain metabolically active and do not divide due to absence of mitogens and energy producing compounds.
Q2. Label the following in diagram
Answer : Option B
Explaination / Solution:
The diagram shown above is Malpighian body or renal corpuscles. The marked part in this is called Podocytes or visceral epithelial cells in Bowman’s capsule in the kidney that warp around capillaries of the glomerules.
Q3. In monocotyledons, guard cell of stomata areThe figure given below is the apical meristem in root. Identify ‘A’ in the diagram.
Answer : Option D
Explaination / Solution:
The part ‘A’ is protoderm in apical meristem of root.
Q4. Which growth is also called apparent growth?
Answer : Option D
Explaination / Solution:
Irreversible increase in mass or volume of plant part is called apparent growth. Apparent growth is permanent and cannot be reversed back as it occurs due to increase in cell number.
Q5. Which of the following statement is correct with respect to nomenclature?
Answer : Option D
Explaination / Solution:
All of the these are the universal rules of binomial nomenclature. Hence, the correct option is All of the above.
Q6. Read the following statements about muscle contraction in humans :
i. chemical energy is converted into mechanical energy during muscle contraction and the chemical is a neurotransmitter.
ii. a neurotransmitter acetylcholine at motor end plate converts electrical energy into mechanical energy.
iii. in a contracted muscle, volume remains the same.
iv. a contracted muscle becomes shorter and thicker.
i. chemical energy is converted into mechanical energy during muscle contraction and the chemical is a neurotransmitter.
ii. a neurotransmitter acetylcholine at motor end plate converts electrical energy into mechanical energy.
iii. in a contracted muscle, volume remains the same.
iv. a contracted muscle becomes shorter and thicker.
Answer : Option A
Explaination / Solution:
The chemical energy is converted into mechanical energy during muscle contraction and the chemical is a neurotransmitter. In a contracted muscle, volume remains the same and a contracted muscle becomes shorter and thicker.
Q7. Difference between osmotic pressure is
Answer : Option D
Explaination / Solution:
Difference between osmotic pressure is called diffusion pressure deficit (DPD). It is the reduction of diffusion pressure of water in solution or cell over its pure state due to presenceof solute.
Q8. Adipose tissue belongs to which tissue?
Answer : Option C
Explaination / Solution:
The connective tissues have soft tissues to specialised types, which include cartilage, bone, adipose, and blood.
Q9. Classification and studies based on chemical constituents of organism is called
Answer : Option D
Explaination / Solution:
Merriam-Webster defines chemotaxonomy as the method of biological classification based on similarities in the structure of certain compounds among the organisms being classified.
Two organisms morphologically similar to each other are classified on the basis of chemotaxonomy.
Q10.
Match the following :
| Hormone | Target tissue/cell |
| a) Follicle stimulating hormone | i) liver |
| b) Luteinising hormone | ii) kidney tubule |
| c) Cortisol | iii)sertoli cells |
| d) Aldosterone | iv) interstitial cells |
Answer : Option B
Explaination / Solution:
Follicle stimulating hormone acts on sertoli cells. Luteinsing hormone acts on interstitial cells. Cortisol cells acts on liver and Aldosterone hormone acts on kidney tubule.
