Question

Shape of chloroplast in higher plant is
A. Discoid
B. Girdle-shaped
C. Reticulata
D. Cup-shaped

Answer 1

Hint: Chloroplast is the cell organelles present in the plants which facilitates the process of photosynthesis. Photosynthetic pigment chlorophyll traps the energy from the sunlight and converts it in the form of energy-storage molecules ATP and NADPH while releasing oxygen and water molecules from the body.

Complete answer:
Chloroplast is a vital organelle of a cell which includes fatty acid synthesis, immune response in the body and amino acid synthesis in the body of the plants. The number of chloroplasts present in the cells can vary from one in unicellular algae up to 100 in plants like wheat. Chloroplast is composed of two membranes and high concentration of chlorophyll. Chloroplast is also known as plastid, which can be of two types that are leucoplast and chromoplast. The chloroplast contains at least three membrane systems which are the outer chloroplast membrane, the inner chloroplast membrane and thylakoid system.
Chloroplasts have various shapes depending on the plant type. For example algae have chloroplast of various shapes like spiral, reticulate, star shape, etc. In higher plants, the chloroplast is disc shaped or discoid. The chloroplast contains stroma which is the protein rich, aqueous, alkaline fluid within the inner membrane and outside the thylakoid space.

Hence, the correct option is A. Discoid.

Note: Chloroplasts contain their own DNA, which is inherited by their ancestors which is estimated as photosynthetic cyanobacterium that was engulfed by an early eukaryotic cell. Chloroplast is not formed by the plant cells but is made by daughter cells during cell division.