Which type of biomolecule includes steroid hormones?
Steroid hormones, such as testosterone and estrogen, are classified as lipids.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Chemical Analysis and Biomolecules - Amino Acids Lipids
#steroid hormones
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A cell is actively synthesising lipids and lipid-like steroidal hormones. Which organelle is expected to be particularly
The smooth endoplasmic reticulum is the major site of lipid synthesis. In animal cells, lipid-like steroidal hormones are also synthesised in the SER.
Ref: NCERT Class 11 Biology Chapter 8: Cell: The Unit of Life Endomembrane System - ER Golgi Lysosome Vacuole
Which lipid serves as a precursor for steroid hormones?
Cholesterol is the accurate answer because it correctly identifies the biological function or role described in this question. In Lipids without annotations, understanding the specific functions of molecules, enzymes, or structures is fundamental. Cholesterol fulfills this particular biological role through its specific structural properties, biochemical activity, or physiological mechanism. The other options (Triacylglycerol, Phosphatidylcholine, and Sphingomyelin) serve different biological functions or are associated with other processes, pathways, or structural roles within the cell or organism.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 10
Steroid hormones are not stored in secretory vesicles because they:
Pick B: Diffuse immediately after synthesis. Thinking about Endocrinology in a practical way — what the structure does, or what the process achieves — leads you here. Clinically and academically, the same logic shows up again and again: the stem is asking for the statement that does not fit the usual rule, and Diffuse immediately after synthesis is that exception in the context of Endocrinology. Hence Diffuse immediately after synthesis is correct. Treat this as a building block for the rest of Endocrinology; neighbouring topics often reuse the same principle. Keep a one-line summary card for this idea and revisit it before the paper; short, repeated review beats long cramming sessions.
Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.