Question

A sequential-expression of a set of a human gene occurs when a steroid molecule binds to the
a. Transfer RNA
b. Messenger RNA
c. DNA sequence
d. Ribosome

Answer 1

Hint: In the human body the steroid molecules are nothing, but steroid hormones that they are synthesized from the cholesterols in the body and the various physiological functions, along with this they also responsible for the certain sequential expression of the gene.

Complete answer:
- Steroid molecule is the chemical messenger where it binds with the DNA molecule and forms many interactions in the nucleus.
- As we all know that steroid hormones are basic sex hormones of both males and females.
- So when these sterile molecules of both sexes are expressed by the specific interaction of steroid molecule which DNA.
- The sequential expression includes transcription, and from which mRNA is formed and further translation, which means the formation of proteins occur.
- Translation mainly helps in the formation of certain proteins, and these proteins are functional in the new target area whenever they are required.
- These proteins are further helpful in maturation and cell differentiation is known as sequential expression
- So the steroid hormone receptor protein complex helps in the activation of transcription of a target through which it gets bound with some specific DNA sequence.

Hence, the correct answer is option (C).

Note: The steroid hormone receptor protein complex generally activates the sequential expression of a gene for steroid hormones, where they bind to specific DNA sequences. It acts as an inducer. HBD element is presently known as hormone binding element.