Read the following statements and select the correct option.
Statement A : Only steroid hormones are able to cross the cell membrane and act via intracellular receptors.
Statement B : Steroid hormones stimulate regulatory genes present on the chromosomes and thus regulate gene expression

Options

A. Only statement A is incorrect
B. Only statement B is incorrect
C. Both statements are incorrect
D. Both statements are correct

Answer

To solve the question, we need to evaluate the two statements provided:

**Statement A**: "Only steroid hormones are able to cross the cell membrane and act via intracellular receptors."
- **Analysis**: Steroid hormones are indeed lipid-soluble, which allows them to easily cross the cell membrane. They bind to intracellular receptors located inside the cell. However, it is important to note that some non-steroid hormones (like thyroid hormones) can also cross the cell membrane and act on intracellular receptors. Therefore, this statement is not entirely correct because it uses the word "only."

**Statement B**: "Steroid hormones stimulate regulatory genes present on the chromosomes and thus regulate gene expression."
- **Analysis**: This statement is correct. Steroid hormones bind to intracellular receptors and can influence gene expression by interacting with regulatory genes on chromosomes. They can alter the transcription of specific genes, leading to changes in protein synthesis.

Now, let's summarize the evaluation of both statements:
- **Statement A** is incorrect because it implies that only steroid hormones can cross the cell membrane, which is not true.
- **Statement B** is correct as it accurately describes the role of steroid hormones in regulating gene expression.

Based on this analysis, we can conclude that the correct option is that only Statement B is correct.

### Final Answer:
- **Only Statement B is correct.**