In lac-operon concept of gene expression, allolactose acts as,
- repressor
- inducer
- co-repressor
- co-enzyme
The Correct Option is B
Solution and Explanation
Top Questions on Regulation of Gene Expression
- Match List I with List II:
List I List II A Two or more alternative forms of a gene I Back cross B Cross of F1 progeny with homozygous recessive parent II Ploidy C Cross of F progeny with any of the parents III Allele D Number of chromosome sets in plant IV Test cross
Choose the correct answer from the options given below:- NEET (UG) - 2024
- Biology
- Regulation of Gene Expression
- In an E. coli strain the i gene gets mutated and its product can not bind the inducer molecule. If the growth medium is provided with lactose, what will be the outcome?
- NEET (UG) - 2022
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- Rop-gene which codes for the proteins involved in the replication of the plasmid pBR322 in E.coli is located at restriction site of
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- Match the following with respect to meiosis:
Column I Column II A Bt cotton I Gene therapy B Adenosine II Cellular defence deaminase deficiency C RNAi III Detection of HIV infection D PCR IV Bacillus thuringiensis - NEET (UG) - 2020
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- Regulation of Gene Expression
- The specific palindromic sequence which is recognized by EcoRI is:
- NEET (UG) - 2020
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Questions Asked in KCET exam
- Ten identical cells each emf 2V and internal resistance 1Ω are connected in series with two cells wrongly connected. A resistor of 10Ω is connected to the combination. What is the current through the resistor?
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- The speed of sound in an ideal gas at a given temperature T is v. The rms speed of gas molecules at that temperature is vrms. The ratio of the velocities v and vrms for helium and oxygen gases are X and X' respectively. Then \(\frac{X}{X'}\) is equal to
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- If \(p(\frac{1}{q}+\frac{1}{r}),q(\frac{1}{r}+\frac{1}{p}),r(\frac{1}{p}+\frac{1}{q})\) are in A.P., then p, q, r
- KCET - 2023
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- A stretched wire of a material whose Young's modulus Y = 2 × 1011 Nm-2 has Poisson's ratio of 0.25. Its lateral strain εl = 10-3. The elastic energy density of the wire is
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- A metallic rod of length 1 m held along east-west direction is allowed to fall down freely. Given horizontal component of earth’s magnetic field BH = 3 × 10-5 T. The emf induced in the rod at an instant t = 2s after it is released is ( Take g = 10 ms-2 )
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Concepts Used:
Regulation of Gene Expression
The process by which the instructions present in our DNA are converted into a functional product, such as a protein is called Gene Expression. It is a tightly coordinated process that allows a cell to respond to its changing environment.
In the meanwhile process, genetic codes from the DNA code are converted into a protein with the help of translation and transcription. The genetic expression shows the process of the genetic makeup of an organism as its physical traits. All over the process, the information flows from genes to proteins.
For a better understanding, let us take the example of the Keratin genes. Keratin is a protein that helps in the formation of our hairs, nails, and skin. Usually, these things grow at a continuous speed as our hairs, nails, and skin get worn down over a period of time. The production of excessive keratin could form many hairs on the skin, dry and hard skin, and thick and long nails. To avoid this, it is necessary to regulate the expression of the keratin gene.
Regulation of gene expression includes different mechanisms through which our cells manage the amount of produced protein by our genes.
