NEET · Biology · STD 12 - 5. molecular basis of inheritance
In the lac operon, the z gene codes for :
- A permease
- B transacetylase
- C beta-galactosidase
- D the repressor of lac operon
Answer & Solution
Correct Answer
(C) beta-galactosidase
Step-by-step Solution
Detailed explanation
(C) beta-galactosidase
In the lac operon, the structural genes are z, y, and a.
The z gene codes for beta-galactosidase, which is primarily responsible for the hydrolysis of the disaccharide lactose into its monomeric units, galactose and glucose.
The y gene codes for permease, which increases permeability of the cell to beta-galactosides.
The a gene codes for a transacetylase.
The i gene codes for the repressor of the lac operon.
In the lac operon, the structural genes are z, y, and a.
The z gene codes for beta-galactosidase, which is primarily responsible for the hydrolysis of the disaccharide lactose into its monomeric units, galactose and glucose.
The y gene codes for permease, which increases permeability of the cell to beta-galactosides.
The a gene codes for a transacetylase.
The i gene codes for the repressor of the lac operon.
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Biology
- The flippers of the Penguins and Dolphins are the example of theNEET 2024 Easy
- Identify the part of a bio-reactor which is used as a foam braker from the given figure.
NEET 2025 Easy - Role of the water vascular system in Echinoderms is _______.
A. Respiration and Locomotion
B. Excretion and Locomotion
C. Capture and transport of food
D. Digestion and Respiration
E. Digestion and Excretion
Choose the correct answer from the options given below :NEET 2025 Easy - Given below are two statements: Statement \(I:\) Restriction endonucleases recognise specific sequence to cut DNA known as palindromic nucleotide sequence. Statement \(II:\) Restriction endonucleases cut the \(DNA\) strand a little away from the centre of the palindromic site. In the light of the above statements, choose the most appropriate answer from the options given below :NEET 2022 Medium
- Albuminous seeds store their reserve food mainly inNEET 2013 Medium
- Alexander von Humboldt described for the first timeNEET 2017 Medium
More PYQs from NEET
- Given the value of Ryderg constant is \(10^7\,\,m^{-1}\) , the wave number of the last line of the Balmer series in hydrogen spectrum will beNEET 2016 Medium
- An alga which can be employed as food for human being isNEET 2014 Medium
- The following plots show variation of velocity \((v)\) with time \((t)\), of a ball thrown vertically upward, and falling back. Which of the following plots is/are correct?
NEET 2026 Easy - Match the Column \(- I\) with Column \(-II\)
Select the correct option \((a)\quad (b)\quad (c) \quad (d)\)Column \(-I\) Column \(-II\) \((a)\; P-\)wave \((i)\) Depolarisation of ventricles \((b)\; QRS\) complex \((ii)\) Repolarisation of ventricles \((c)\; T-\)wave \((iii)\) Coronary ischemia \((d)\) Reduction in the size of \(T-\)wave \((iv)\) Depolarisation of atria \((v)\) Repolarisation of atria NEET 2019 Medium - The variation of the boiling points ofthe hydrogen halides is in the order \(HF > HI > HBr > HCl.\) What explains the higher boiling point of hydrogen fluoride ?NEET 2015 Hard
- Suppose the elements \(X\) and \(Y\) combine to form two compounds \(XY_2\) and \(X_3Y_2.\) When \(0.1\) mole of \(XY_2\) weighs \(10\ g\) and \(0.05\) mole of \(X_3Y_2\) weighs \(9\ g,\) the atomic weights of \(X\) and \(Y\) areNEET 2016 Medium