Question : In a plant, __________ is present in the middle lamella, primary and secondary cell walls and accumulates in the initial stages of development during cell expansion.

Option 1: chitin

Option 2: gelatin

Option 3: alginate

Option 4: pectin

Question : Which of the following options is not correct about plant cells?

Option 1: The cell wall of a plant cell is made up of cellulose.

Option 2: The plant cells cannot divide by mitosis.

Option 3: A plant cell usually contains a large vacuole.

Option 4: Generally, all plant cells contain chloroplast.

Question : The productivity of an ecosystem is composed of which of the following?

Option 1: Gross productivity and primary productivity

Option 2: Primary and secondary productivity

Option 3: Net productivity and consumption

Option 4: Net primary productivity and gross primary productivity

Question : Courier service comes under which sector?

Option 1: Primary

Option 2: Secondary

Option 3: Tertiary

Option 4: Both secondary and tertiary

Question : Which is the oldest aluminium refinery plant in India?

Option 1: The Damanjodi Plant

Option 2: The Muri Alumina Plant

Option 3: The Mettur Plant

Option 4: The Belgaum Plant

Question : Which of the following is found in plant cells only?

Option 1: Cell membrane

Option 2: Cell wall

Option 3: Nucleolus

Option 4: Mitochondria