Question

3 Which organelles are present in large numbers in cells that produce insulin?

A nuclei and mitochondria
B ribosomes and mitochondria
C rough endoplasmic reticulum and cell walls
D vesicles and nuclei

Answer 1

B

Step-by-step explanation:

Insulin is a peptide hormone (hormone constituted by "shorter" amino acid chains) produced in the beta cells of the pancreas, and is a very important anabolic agent in our bodies.

The Endoplasmic Reticulum (ER) plays a very important role in many aspects of a cell's metabolism, namely in the synthesis and transport (secretion) of proteins and peptides, such as insulin. The Rough Endoplasmic Reticulum (RER) is called that way because of the high concentrations of ribosomes (protein synthesising particles) on its surface.

The mitochondria are chemical-energy generators (ATP), and are involved in essentially every process that takes place in a cell. Its relation to protein synthesis and secretion is in the fact that these two are processes that require energy, which comes largely from mitochondria.

Potential Doubts:

Why can't the answer be C?

The explanation is simple. Cell walls aren't found in insulin-producing organisms, which is why even though "rough endoplasmic reticulum" would be a valid answer, we must discard C.

Answer 2

Answer:- B

Explanation:- It is the ribosomes and mitochondria of the specialized cells in the pancreas that make insulin. Remember, most human cells make proteins at the protein factory called the ribosome. This ribosome is either free floating in the cytoplasm.