BPSC – Combined Competitive Examination · প্রশ্ন 142

Biological membranes are composed of:

Lipids and proteins in varying combinations specific to each species, cell type and organelle
Lipids only
Proteins only
None of the above

উত্তর দেখান ও ব্যাখ্যা

উত্তর: (A) Lipids and proteins in varying combinations specific to each species, cell type and organelle

ব্যাখ্যা

Membranes are lipid–protein assemblies (with some carbohydrate) whose ratio differs between cell types.

(A) সঠিক
Correct: the fluid mosaic model: a lipid bilayer with proteins, varying by cell type.
(B) ভুল
Wrong: membranes also contain proteins.
(C) ভুল
Wrong: membranes also contain lipids.
(D) ভুল
Wrong: option A is correct.