Question

Indicate true (T) and false (F) statements below regarding peroxisomal proteins. Your answer would be a four-letter string composed of letters T and F only, e.g. TTTF.

(A ) All peroxisomal proteins are encoded in the nucleus.
( B) Some peroxisomal proteins are synthesized by ribosomes attached to the rough endoplasmic reticulum.
( C) All peroxisomal proteins reach the organelle after their synthesis is completed.
( D) Peroxisomal proteins have to be unfolded before import.

Answer 1

Not all peroxisomal proteins are encoded in the nucleus. Some are synthesized by ribosomes attached to the RER before being transported to the peroxisome. Peroxisomal proteins do not need to be unfolded before import.

Step-by-step explanation:

The correct answer is TFTF.

(A) False. Not all peroxisomal proteins are encoded in the nucleus. Some peroxisomal proteins are encoded by genes in the nucleus and are then transported into the peroxisome.

(B) True. Some peroxisomal proteins are synthesized by ribosomes attached to the rough endoplasmic reticulum (RER) and then transported to the peroxisome.

(C) True. All peroxisomal proteins reach the organelle after their synthesis is completed. They are then targeted and imported into the peroxisome.

(D) False. Peroxisomal proteins do not need to be unfolded before import. They can be imported into the peroxisome in their folded state.