- 1(current)
Q. No.Subtopic: Gene Regulation: Lac Operon |
89%
Level 1: 80%+
NEET - 2022
Hints
Match List-I with List- II
Choose the correct answer from the options given below :
| List -I | List -II |
| (a) In lac operon i gene codes for | (i) transacetylase |
| (b) In lac operon z gene codes for | (ii) permease |
| (c) In lac operon y gene codes for | (iii) \(\beta-\)galactosidase |
| (d) In lac operon a gene codes for | (iv) Repressor |
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (ii) | (i) | (iv) |
| 2. | (iv) | (iii) | (ii) | (i) |
| 3. | (iv) | (i) | (iii) | (ii) |
| 4. | (iii) | (i) | (iv) | (ii) |
Subtopic: Gene Regulation: Lac Operon |
91%
Level 1: 80%+
NEET - 2022
Hints
Select the two correct statements out of the four (a-d) given below about lac operon :
| (a) | Glucose or galactose may bind with the repressor and inactivate it. |
| (b) | In the absence of lactose, the repressor binds with the operator region. |
| (c) | The z-gene codes for permease. |
| (d) | This was elucidated by Francois Jacob and Jacque Monod. |
The correct statements are :
| 1. | (a) and (c) | 2. | (b) and (d) |
| 3. | (a) and (b) | 4. | (b) and (c) |
Subtopic: Gene Regulation: Lac Operon |
88%
Level 1: 80%+
Hints
Match the following genes of the lac operon with their respective products:
| (a) | i gene | (i) | -galactosidase |
| (b) | Z gene | (ii) | Permease |
| (c) | A gene | (iii) | Repressor |
| (d) | Y gene | (iv) | transacetylase |
Select the correct option
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iii) | (iv) | (i) | (ii) |
| 2. | (i) | (iii) | (ii) | (iv) |
| 3. | (iii) | (i) | (ii) | (iv) |
| 4. | (iii) | (i) | (iv) | (ii) |
Subtopic: Gene Regulation: Lac Operon |
71%
Level 2: 60%+
NEET - 2019
Hints
Read the following four statements (A-D):
| A. | In transcription, adenosine pairs with uracil |
| B. | Regulation of lac operon by a repressor is referred to as positive regulation |
| C. | The human genome has approximately 50,000 genes |
| D. | Haemophilia is a sex-linked recessive disease |
How many of the above statements are right?
1. Three
2. Four
3. One
4. Two
Subtopic: Gene Regulation: Lac Operon | Human Genome Project | Transcription |
58%
Level 3: 35%-60%
AIPMT - 2012
Hints
Jacob and Monad studied lactose metabolism in E.Coli and proposed the Operon concept. The Operon concept is applicable to:
1. All prokaryotes
2. All prokaryotes and some eukaryotes
3. All prokaryotes and all eukaryotes
4. All prokaryotes and some protozoans
Subtopic: Gene Regulation: Lac Operon |
58%
Level 3: 35%-60%
AIPMT - 2002
Hints
- 1(current)
Q. No.
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