Question:

Jacob and Monad studied lactose metabolism in E.Coli and proposed operon concept. Operon concept applicable for

Updated On: Mar 28, 2024

All prokaryotes
All prokaryotes and some eukaryotes
All prokaryotes and all eukaryotes
All prokaryotes and some protozoanes

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The Correct Option is A

Solution and Explanation

The correct option is (A) : All prokaryotes

The Lac operon idea was developed by Jacob and Monad after their investigation of lactose metabolism in E. coli. The idea clarifies how lactose is transported and metabolised by Escherichia coli and many other intestinal bacteria. Every prokaryote can benefit from understanding the Lac-operon idea.

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Questions Asked in NEET exam

Match List I with List II :

List - I		List – II
A.	Residual Volume	i.	Maximum volume of air that can be breathed in after forced expiration
B.	Vital Capacity	ii.	Volume of air inspired or expired during normal respiration
C.	Expiratory Capacity	iii.	Volume of air remaining in lungs after forcible expiration
D.	Tidal Volume	iv.	Total volume of air expired after normal inspiration

Choose the correct answer from the options given below :

NEET (UG) - 2024
The respiratory system

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Match List I with List II:

List I		List II
A	Robert May	I	Species-Area relationship
B	Alexander von Humboldt	II	Long term ecosystem experiment using out door plots
C	Paul Ehrlich	III	Global species diversity at about 7 million
D	David Tilman	IV	Rivet popper hypothesis

Choose the correct answer from the options given below:

NEET (UG) - 2024
Species diversity

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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : The potential (V) at any axial point, at 2 m distance(r) from the centre of the dipole of dipole moment vector \(\vec{P}\) of magnitude, 4 × 10^-6 C m, is ± 9 × 10³ V.
(Take \(\frac{1}{4\pi\epsilon_0}=9\times10^9\) SI units)
Reason R : \(V=±\frac{2P}{4\pi \epsilon_0r^2}\), where r is the distance of any axial point, situated at 2 m from the centre of the dipole.
In the light of the above statements, choose the correct answer from the options given below :
- NEET (UG) - 2024
- Magnetic Field
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Concepts Used:

Cell Cycle and Cell Division

Cell Cycle:

The sequence of events by which a cell copies itself synthesizes other constituents of the cell and eventually splits into two daughter cells is termed the cell cycle. The cell synthesizes all its constituents in a sequential pattern to make sure the proper division and distribution of components that occurs between the two daughter cells. Therefore, we can say that the cell cycle is the period of time between the development of new daughter cells and their further division.

Stages of Cell Cycle:

The cell cycle can be sub-divided into an additional category of Interphase. Meanwhile, the Interphase can be branched into 3 further stages, such as:

G1 Phase - “Gap 1 Phase”
S Phase - "Synthesis Phase"
G2 Phase - "Gap 2 Phase"

Read More: Cell Cycle and Cell Division

Cell Division:

The division of the parent cells into two or more cells is called daughter cell, cell division takes place. In general, it occurs as a part of a larger cell cycle. All the cell reproduces by dividing into two, wherein each parental cell produces two daughter cells.

Stages of Cell Division:

Cell division can be widely divided into several sub-segments that result from Mitosis and Meiosis.

Mitosis or (M Phase)
Meiosis

	List I		List II
A	CCK	I	Kidney
B	GIP	II	Heart
C	ANF	III	Gastric gland
D	ADH	IV	Pancreas