Question

Read the following statements and find out the correct statements.

a. Mitochondrion is typically sausage shaped or cylindrical.
b. The inner compartment of the mitochondrion is called stroma and of chloroplast is called matrix.
c. Mitochondria and bacteria both divide by fission.
d. Chromoplasts have fat insoluble carotenoid pigments like carotene and xanthophylls.
e. Plastids are found in all plant cells and euglenoids.

• A. b, c, e
• B. c, d, e
• C. a, b, d
• D. a, c, e

Answer 1

The correct option is D a, c, e

Statement a

Statement : Mitochondrion is typically sausage shaped or cylindrical.

Elaboration: The structure of every mitochondrion is cylindrical or a sausage shape. The cylindrical structure has an average diameter of 0.5 microns and a length of 1.0-4.1 microns. The size and structure o f the mitochondria may be variable depending on the physiological activity. Hence, statement (a) is true.

Statement b

Statement : The inner compartment of the mitochondrion is called stroma and of chloroplast is called matrix.

Elaboration: The internal matrix of the chloroplast is called the stroma and the inner compartment of the mitochondrion contains mitochondrial matrix. Hence, statement (b) is wrong.

Statement c

Statement : Mitochondria and bacteria both divide by fission.

Elaboration: Just like reproduction in bacteria,the mitochondria also divides by fission. Fission of mitochondria occurs during cell division to produce multiple copies for the new cell after division. Hence statement (c) is true.

Statement d

Statement : Chromoplasts have fat insoluble carotenoid pigments like carotene and xanthophylls.

Elaboration: Chromoplasts have carotenoid pigments like carotene and xanthophylls which are far soluble components. These pigments are responsible for providing. These pigments are responsible for providing yellow, red or orange colour to plant parts. Hence, statement (d) is wrong.

Statement e

Statement : Plastids are found in all plant cells and euglenoids.

Elaboration : Plastids are present in both the plant cells and euglenoids. Euglenoids are photosynthetic in the presence of sunlight and for that they need the chloroplast. Hence. statement (e) is true.

Final answer: d. a, c, e