0

Biology (Medical Entrance)

Attempted 0/14 Correct 0 Score 0

Operon model for prokaryotic gene regulation was proposed by

  1. Watson and Crick

  2. Griffith

  3. Oparin and Haldane

  4. Jacob and Monad


Correct Option: D
Explanation:

Operon model for prokaryotic gene regulation was proposed by Jacob and Monad.

Decrease in blood pressure stimulates JGA to secrete

  1. rennin

  2. renin

  3. aldosterone

  4. ADH


Correct Option: B
Explanation:

Decrease in blood pressure stimulates JGA to secrete renin.

The term osmosis was proposed by

  1. Nollet

  2. Pfeffer

  3. Slatyer and Tayler

  4. Bergerstein


Correct Option: A
Explanation:

He proposed the term Osmosis.

Peyer's patches are lymphoid nodules found on

  1. the liver

  2. the ileum

  3. the kidney

  4. the stomach


Correct Option: B
Explanation:

Peyers patches are lymphoid nodules found on the ileum.

The term root pressure was coined by

  1. Stephan Hales

  2. Pfeffer

  3. Nollet

  4. Bergerstein


Correct Option: A
Explanation:

He coined the term root pressure in 1927.

Ringing experiment to show that xylem is the channel of ascent of sap was conducted by

  1. Sir J.C. Bose

  2. Malphigi, Stephan Hales and Hartig

  3. Godlewski

  4. Dixon and Jolley


Correct Option: B
Explanation:

 Malphigi in 1672, Stephan Hales in 1727, Hartig conducted the ringing experiment to show that xylem is the mode of ascent of sap. 

The caps and tails attached to mRNA protects it from

  1. proteases

  2. Ligases

  3. Nucleases and phosphatases

  4. Polymerases


Correct Option: C
Explanation:

The caps and tails attached to mRNA protects it from  Nucleases and phosphatases of cytoplasm.

The term guttation was coined by

  1. Bergerstein

  2. Nollet

  3. Pfeffer

  4. Stephan Hales


Correct Option: A
Explanation:

The term guttation was coined by Bergerstein.

Who said that transpiration is a necessary evil?

  1. Sir J. C. Bose

  2. Godlewski

  3. Dixon and Jolley

  4. Curtis


Correct Option: D
Explanation:

He said that transpiration is a necessary evil.

What causes the warfing of wooden frames in rainy season?

  1. Imbibition

  2. Absorption

  3. Guttation

  4. Transpiration


Correct Option: A
Explanation:

It is the adsorption of the water by the particles of solid substances which causes the warfing of wooden frames in rainy season. 

A fresh water plant dies when transferred to marine water due to

  1. root pressure.

  2. exosmosis.

  3. endosmosis.

  4. thermo-osmosis.


Correct Option: B
Explanation:

the plant dies due to exosmosis as the concentration of the solution is higher in marine water  than that of a cell sap.

Root pressure does not occur in

  1. gymnosperms.

  2. angiosperms.

  3. monocots.

  4. dicots.


Correct Option: A
Explanation:

Root pressure is maintained due to xylem vessels. Gymnosperms lack vessels, thus do not possess root pressure.

Who coined the the term osmotic pressure?

  1. Nollet

  2. Pfeffer

  3. Bergerstein

  4. Godlewski


Correct Option: B
Explanation:

He coined the term Osmotic Potential.

Who proposed that guttation and bleeding are manifestations of root pressure?

  1. Stocking

  2. Nollet

  3. Bergerstein

  4. Pfeffer


Correct Option: A
Explanation:

He proposed that guttation and bleeding are menifestations of root pressure in 1956.

- Hide questions