Question

Which one of the following cellular parts is correctly described?

• A. A) Thylakoids – flattened membranous sacs forming the grana of chloroplasts
• B. B) Lysosomes – optimally active at a pH of about 8.5
• C. C) Centrioles – sites for active RNA synthesis
• D. D) Ribosomes – those on chloroplasts are larger (80s) while those in the cytoplasm are smaller (70s)

Answer 1

The correct option is A

A) Thylakoids – flattened membranous sacs forming the grana of chloroplasts

The correct option is Option A.

Explanation of correct option:

1. The epithelial tissue embraces the cell and regulates the molecules that enter and exit it.
2. The nucleus is a cell structure that houses a nucleolus as well as the remainder of the cell's DNA. And it is where the mass of RNA is synthesized.
3. Refers to the process is still a vessel that is encompassed by two unit barriers and supplied with stroma, which really is a complete protein fluid matrix.

Explanation of incorrect options:

Option B:

1. Lysosomes have an acid building that blocks polymorphic micro organelles.
2. At acidic pH, the hydrolases in lysosomes remain functioning (4-5).

Option C:

1. The activity of cytokinesis is accomplished once the mitotic spindle is organized between centrosomes.
2. They also had no role in the performance of RNA.

Option D:

1. Lysosomes have sac-like spherical particles and cell organelles.
2. They include mainly composed of lipase that decomposes a myriad of substances.

Final answer: Thylakoids – flattened membranous sacs forming the grana of chloroplasts is correctly described.