Which one of the following cellular parts is correctly described?

Which One Of The Following Cellular Parts Is Correctly Desicribed Biology Question

Which one of the following cellular parts is correctly described?

Options

(a) Centrioles – Sites for active RNA synthesis
(b) Lysosomes – Optimally active at a pH of about 8.5
(c) Thylakoids – Flattened membranous sacs forming the grana of chloroplasts
(d) Ribosomes – Those on chloroplasts are larger (80S) while those in the cytoplasm are smaller (70S)

Correct Answer:

Thylakoids – Flattened membranous sacs forming the grana of chloroplasts

Explanation:

Centrioles serve as basal bodies for cilia and flagella. They are concerned with spindle formation during cell division. Lysosomes are membrane-bound organelles containing many hydrolytic enzymes, which are optimally active at an acid pH (near pH 5). Thylakoids are membrane-bound organelles found within chloroplasts. The thylakoid membrane, forms many flattened, fluid-filled tubules that enclose a single convoluted compartment. These tubules tend to stack on top of each other to forma structure called a granum.

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  2. A neuron is a microscopic structure composed of
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  4. The element particles on mitochondria are concerned with
  5. Respiratory centre of brain is sensitive to

Topics: Cell Structure and Functions (413)
Subject: Biology (4253)

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