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#steroid hormones

5 public questions tagged with this topic.

Glycolipid and Phospholipid

Which sterol serves as a precursor for steroid hormone synthesis?

Mammalian steroid hormone biosynthesis strictly begins cholesterol carbon skeleton source fundamental endocrine biochemistry regulation stress reproduction. Cholesterol imported via LDL receptor mediated endocytosis clathrin dependent or synthesized de novo via HMGCoA reductase in ER transferred mitochondria by steroidogenic acute regulatory protein StAR forming contact sites outer inner membrane requiring TSPO. Inner membrane P450 side chain cleavage CYP11A1 encoded fifteen q24 catalyzes three hydroxylations sequential oxygen NADPH adrenodoxin consuming producing twenty two R hydroxyl twenty

Ref: Payne AH & Hales DB, Endocrine Reviews 2004, Cholesterol as precursor pregnenolone steroid hormones biosynthesis.

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Lipids

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 org

Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 10

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Endocrinology

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

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.

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