Tag: botany

Questions Related to botany

While purchasing a sealed packet of ghee, one should look for which mark?

botany biotechnology and its applications biotechnological regulations pcr asexual modes of reproduction

  1. ISI

  2. AGMARK

  3. FPO

  4. ISO

Show answer
Correct Option: B
Explanation:
  • AGMARK is a certification mark employed on agricultural products in India. 
  • Assuring that they conform to a set of standards approved by the Directorate of Marketing and Inspection. 
  • All agricultural products like grain, milk, dairy product, etc. come under this quality assurance policy. 
  • Ghee is a dairy product and it belongs to agriculture production so it should have AGMARK.
  • So, the answer is option B.

If the fermentation of molasses during the manufacturing of ethyl alcohol is delayed then the conclusion that can drawn is

botany biotechnology and its applications biotechnological regulations pcr asexual modes of reproduction

  1. Molasses is diluted

  2. Molasses is not diluted

  3. More yeast is added

  4. Temperature is maintained around 410 K

Show answer
Correct Option: B
Explanation:
  • The sugarcane molasses are generally used as the fermentation medium. 
  • The yeast cells are grown in this medium to perform anaerobic respiration which produces ethanol and carbon dioxide. 
  • The molasses which are used is diluted so that the activity of yeast cells is fast and the production of ethanol occurs at a rapid pace. 
  • If the process is slowed down, then the molasses must not have been diluted before the addition of the fermentation medium in the fermentor.
  • Thus, the correct answer is option B. 

The loss of water from the aerial parts of the plant is known as

botany breath and blood of life different types of circulatory systems stomata and transpiration transport in organisms

  1. Photosynthesis

  2. Transpiration

  3. Reproduction

  4. Respiration

Show answer
Correct Option: B
Explanation:

Photosynthesis is the process of synthesis of food from inorganic compounds like carbon dioxide and water and sunlight.

Transpiration is the process of release of water vapour from aerial parts, such as leaves, stems and flowers.
Reproduction is the process of producing an offspring for continuation of species.
Respiration is the process of releasing energy by breaking down organic compounds like sugars.
So, the correct answer is 'Transpiration'.

Rate of water absorption generally follows closely the rate of

botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

  1. Transpiration

  2. Photosynthesis

  3. Respiration

  4. Growth

Show answer
Correct Option: A
Explanation:
The rate of transpiration is high on a bright sunny day. The water is lost from guard cell which leads to decrease in the water potential of guard cell as compared to the surrounding cell. To stabilize the water potential in the guard cell water rushes from the neighboring cell which creates a cohesion pull in the xylem vessels to pull the water up to the guard cell. Thus, the rate of water absorption increases when the transpiration is high. 
So, the correct answer is option A.

Water absorption through roots can be increased by keeping the plants

botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

  1. In the shade

  2. In dim light

  3. Under the fan

  4. Covered with a polythene bag

Show answer
Correct Option: C
Explanation:
  • Water absorption through the roots can be increased by keeping the plants under the fan. 
  • As by keeping the plants under the fan, the transpiration process is boosted. Therefore, more amount of water and other minerals are absorbed by the plant roots from the soil. 
  • The more is the rate of evaporation of water from the plants the greater is the rate of transpiration.
  • Hence Water absorption through roots can be increased by keeping the plants under the fan.
  • So, the correct answer is 'Under the fan'.

In root apoplast path of water transport; the water is transported through

botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

  1. Cell wall only

  2. Cell wall and inter cellular spaces

  3. Intercellular spaces

  4. Intercellular spaces, cell walls and endodermis.

Show answer
Correct Option: B
Explanation:

The water transport in the apoplastic pathway is through the cell membrane and the intercellular spaces. Water and solutes can pass freely through them.

This happens when water cannot enter the cells due to the presence of Caspian strips. 
So the correct answer is ' Cell wall and intercellular spaces'.

Apoplast is located

botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

  1. Outside the plasma membrane

  2. In the entire cytosol

  3. inside the plasma membrane

  4. In the plastidial content

Show answer
Correct Option: A
Explanation:

In the Apoplast pathway water cannot enter the protoplasm.

It travels through  the space between the cell wall and cell membrane and intercellular spaces.
So the correct answer is 'Outside the plasma membrane'.

The pathway which water moves through cell wall without crossing any membrane

botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

  1. apoplast pathway

  2. symplast pathway

  3. vacuolar pathway

  4. transmembrane pathway

Show answer
Correct Option: A

Mark true statement about apoplast pathway.

botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

  1. Apoplast pathway may be aided by cytoplasmic streaming

  2. Apoplast pathway is continuous throughout the plant without any exception

  3. Apoplast pathway is faster than symplast pathway

  4. In Apoplast pathway mass flow of water occurs through plasmodesmata

Show answer
Correct Option: C
Explanation:

Apoplast is the system of cell walls which is continuous throughout the plant except in some parts like Casparian strips in the roots. Therefore it cannot be aided by cytoplasmic streaming and cannot occur through plasmodesmata. So, the correct answer is 'apoplast pathway is faster than the symplast pathway'

Movement of water through the symplast involves crossing the 

botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

  1. Intercellular spaces

  2. Cell wall

  3. Cell membrane

  4. More than one option is correct

Show answer
Correct Option: C