Question

the protein structures that functions to provide support, structure, and mobility to the cell.
a cell wall
b plasma membrane
c cyoskeleton
d nuclear envelope

question 14
the non-membranous organelle that function in protein production.
a nucleus
b chloroplast
c mitochondria
d golgi apparatus
e rough endoplasmic reticulum
f smooth endoplasmic reticulum
g ribosome

Explanation:

First Question (about protein structures for cell support, structure, mobility):

• Option A: Cell wall is a rigid structure (in plant/fungal cells) mainly for protection/support, not made of proteins (mostly cellulose in plants) and not for mobility.
• Option B: Plasma membrane (cell membrane) is a lipid - protein bilayer, its main functions are selective permeability, cell - cell communication, not primary support/structure/mobility provider as asked.
• Option C: Cytoskeleton is made of protein filaments (like microtubules, microfilaments, intermediate filaments). It provides cell support, maintains cell shape, and is involved in cell movement (like in cell division, cell crawling).
• Option D: Nuclear envelope is a membrane around the nucleus, involved in separating nucleus from cytoplasm, not for cell - wide support/structure/mobility.

• Option A: Nucleus is a membranous organelle (has nuclear envelope) and is the control center, not for protein production.
• Option B: Chloroplast is a membranous organelle (has double membrane) and is for photosynthesis, not protein production.
• Option C: Mitochondria is a membranous organelle (double membrane) and is for energy production (ATP), not protein production.
• Option D: Golgi apparatus is a membranous organelle (stack of membranes) for protein modification and sorting, not production.
• Option E: Rough endoplasmic reticulum is membranous (has ribosomes on it) and is involved in protein processing, but it is membranous.
• Option F: Smooth endoplasmic reticulum is membranous and is for lipid synthesis, detoxification, etc., not protein production.
• Option G: Ribosome is non - membranous (made of rRNA and proteins) and its function is to synthesize proteins (translation).

Answer:

C. Cyoskeleton (Note: There is a typo, should be Cytoskeleton)

Question 14 (non - membranous organelle for protein production):