Cell - 17-05-23

Which of the following statement is incorrect?

• (a) Mitochondria, unless specifically stained are not easily visible under the microscope

• (b) Physiological activity of cells determines the number of mitochondria per cell

• (c) Mitochondrion, a power house of cell has DNA, RNA, ribosomes and enzyme. So it can survive outside the cell

• (d) Mitochondria divide by fission

70S ribosomes are found –

• (a) In prokaryotic cells, mitochondria and chloroplast

• (b) In prokaryotic cells and in cytoplasm of eukaryotic cells

• (c) On Endoplasmic reticulum

• (d) On Endoplasmic reticulum and Nuclear membrane

Both the membranes of a mitochondrion are –

• (a) Structurally different but functionally similar

• (b) Structurally as well as functionally different

• (c) Structurally similar but functionally different

• (d) Structurally as well as functionally similar

The matrix of which cell organelle has single circular DNA molecule, a few RNA, 70S ribosomes and components required for protein synthesis and aerobic respiration –

• (a) Chloroplast

• (b) Golgi Body

• (c) Mitochondrion

• (d) ER

Carotenoids –

• (a) Are fat soluble pigments

• (b) Include carotene (orange) and xanthophyll (yellow) pigment

• (c) Are present in both chloroplasts and chromoplasts

• (d) All

In chloroplast, chlorophyll is present in –

• (a) thylakoid

• (b) Stroma

• (c) Outer membrane

• (d) Inner membrane of envelope

In higher plants the chloroplast is –

• (a) Spiral

• (b) Lens - shaped

• (c) Cup shaped

• (d) Reticulate

Grana of the chloroplast are interconnected by –

• (a) Granal thylakoids

• (b) Granal lamellae

• (c) Stromal lamellae

• (d) Stroma

Most prokaryotic cells, particularly the bacterial cells, have

• (a) A chemically simple cell envelope

• (b) A chemically complex cell envelope

• (c) No cell envelope

• (d) Cell envelope only in the form a cell membrane

The eukaryotes include –

• (a) Fungi

• (b) Protists

• (c) Plants and animals

• (d) All