Tracheids differ from the tracheary elements in:

1.	Having casparian strips	2.	Being imperforate
3.	Lacking nucleus	4.	Being lignified

Example of an edible underground stem is:

1. Carrot

2. Groundnut

3. Sweet potato 

4. Potato

Which of the following structures performs the function of mitochondria in a bacteria?

The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as:

1. Microtubules

2. Microfilaments

3. Intermediate filaments

4. Lamins

The osmotic expansion of a cell kept in water is chiefly regulated by:

1. Mitochondria

2. Vacuoles

3. Plastids

4. Ribosomes

During which phase(s) of the cell cycle, amount of DNA in a cell remains at 4 C level if the initial amount is denoted as 2C:

Match the following and select the correct answer: 

1. A-iv, B-ii, C-i, D-iii

2. A-i, B-ii, C-iv, D-iii

3. A-i, B-iii, C-ii, D-iv

4. A-iv, B-iii, C-i, D-ii

Dr. F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly - cut coleoptile stumps. What is the significance of this experiment?

Deficiency symptoms of nitrogen and potassium are visible first in:

1. Senescent leaves

2. Young leaves

3. Roots

4. Buds

In which one of the following processes CO₂ is not released?

1. Aerobic respiration in plants

2. Aerobic respiration in animals

3. Alcoholic fermentation

4. Lactate fermentation