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प्रश्न
Sometimes cattle or even human beings give birth to their young ones that are having extremely different sets of organs like limbs/position of eye(s) etc. Comment.
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उत्तर
There is a disturbance in co-ordinated regulation of the expression of sets of genes associated with organ development.
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संबंधित प्रश्न
When lactose is present in the culture medium:
Distinguish between structural gene, regulatory gene and operator gene.
Which of the following factors regulate gene expression?
Genes that are involved in turning on or off the transcription of a set of structural genes are called ______.
The image below shows the result of plating bacteria in a chromogenic medium after incorporating the gene of interest in the plasmid. Some plates had blue colonies; some plates had white colonies. A single bacterium extracted from Plate I, II, and III is shown below:
On the basis of your observations:
- Identify the plate(s) which is/are white. Give a reason.
- Identify the plate(s) which is/are blue. Give a reason.
List the changes that the primary transcript undergoes to become functional mRNA.
Which of the following are the post-transcriptional events in an eukaryotic cell?
- Transport of pre-mRNA to cytoplasm prior to splicing.
- Removal of introns and joining of exons.
- Addition of methyl group at 5' end of hnRNA.
- Addition of adenine residues at 3' end of hnRNA.
- Base pairing of two complementary RNAs.
Choose the correct answer from the options given below:
Which of the following best describes gene regulation?
Which process is responsible for development and differentiation from embryo to adult organism?
At how many levels can gene regulation occur in eukaryotes?
Which level of gene regulation specifically controls splicing in eukaryotes?
Which level of gene regulation involves the movement of mRNA from the nucleus to the cytoplasm?
What enzyme does Escherichia coli produce to break down lactose?
What are the two products formed when E. coli β-galactosidase breaks down lactose?
What is the molecule that triggers the synthesis of an inducible enzyme called?
Which type of control is exemplified by feedback repression?
