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Question
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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Solution
There is a disturbance in co-ordinated regulation of the expression of sets of genes associated with organ development.
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RELATED QUESTIONS
Distinguish between structural gene, regulatory gene and operator gene.
A low level of expression of lac operon occurs at all the time. Justify the statement.
______ refers to the phenomenon by which a set of genes are switched on when there is necessity to metabolise a new substrate.
Which of the following factors regulate gene expression?
Which of the following is not a level at which gene expression can be regulated in eukaryotes?
The gene which codes for enzyme β-galactosidase ______.
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:
Match List I with List II:
| List I | List II |
| A. Gene ‘a’ | I. β-galactosidase |
| B. Gene ‘y’ | II. Transacetylase |
| C. Gene ‘i’ | III. Permease |
| D. Gene ‘z’ | IV. Repressor protein |
Choose the correct answer from the options given below:
Gene regulation can be described as switching genes ON or OFF according to which two factors?
Which condition regulates gene expression in a cell?
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 involves the formation of the primary transcript in eukaryotes?
Which level of gene regulation specifically controls splicing in eukaryotes?
At which level of gene regulation is control exerted during protein synthesis in eukaryotes?
What enzyme does Escherichia coli produce to break down lactose?
What term describes the process by which inducible enzymes are produced?
Is the production of inducible enzymes an example of positive or negative control?
