CBSE 11TH BIOLOGY - Online Test
Q1. Lysosomes are produced by
Answer : Option D
Explaination / Solution:
Lysosomes are manufactured and budded into the cytoplasm by the Golgi apparatus with enzymes inside.
The enzymes that are within the lysosome are made in the rough endoplasmic reticulum, which are then delivered to the Golgi apparatus via transport vesicles.
Q2. Hill reaction requires
Answer : Option A
Explaination / Solution:
The light dependent transfer of electrons by chloroplasts in photosynthesis that results in the cleavage of water molecule and liberation of oxygen is called Hill reaction. Hill reaction required ferrricynide.
Q3. The principle of exchange of gases at the lungs is :
Answer : Option A
Explaination / Solution:
The main function of the respiratory system is gaseous exchange. This refers to the process of Oxygen and Carbon Dioxide moving between the lungs and blood. Diffusion occurs when molecules move from an area of high concentration (of that molecule) to an area of low concentration. This occurs during gaseous exchange as the blood in the capillaries surrounding the alveoli has a lower oxygen concentration of Oxygen than the air in the alveoli which has just been inhaled.
Q4.
Match the following :
| Column A | Column B |
| a) PTH | i) Mineralocorticoid |
| b) Cortisol | ii) Inhibiting hormone |
| c) Aldosterone | iii)Collip’s hormone |
| d) Somatostatin | iv) Glucocorticoid |
Answer : Option C
Explaination / Solution:
pituitary thyroid hormone is also called as collip’s hormone. Cortisol is called as glucocorticoid hormone. Aldosterone is called as mineralocorticoid and somatostatin is called as inhibiting hormone.
Q5. Which phylum has water vascular system as a characteristic feature?
Answer : Option C
Explaination / Solution:
The most distinctive feature of Echinodermata is the presence of water vascular system.
Q6. Which of the following is not obtained on hydrolysis of nucleic acid?
Answer : Option D
Explaination / Solution:
Hydrolysis of nucleic acid (DNA and RNA) produces pentose sugar ( ribose or deoxyribose) purine and pyrimidine. Phosphoric acid is not released on hydrolysis of DNA or RNA.
Q7. The mass of tissue seen in the left corner of the right atrium close to the atri-ventricular septum is
Answer : Option D
Explaination / Solution:
Atrioventricular Node or AV node is compact half oval mass of myogenic fibres which lies in the posterior septal wall of right atrium near the opening of coronary sinus. It receives impulse from SA node and transmits it to ventricles.
Q8. Electron transport system take place in
Answer : Option B
Explaination / Solution:
The metabolic pathway through which the electron passes from one carrier to another, is called the ETS and it is present in the inner mitochondrial membrane.
Q9. A scar on the seed coat through which the developing seeds were attached to the fruit is called
Answer : Option C
Explaination / Solution:
The hilum is a scar on the seed coat through which the developing seeds were attached to the fruit.
Q10. Which of the following phases in mitosis is in correct order?
Answer : Option D
Explaination / Solution:
- Mitosis. A four-stage process that creates two identical cells from one original cell.
- Prophase. The first and longest stage of mitosis. ...
- Metaphase. The second stage of mitosis. ...
- Anaphase. The third stage of mitosis. ...
- Telophase. The fourth and last stage of mitosis.
