Mesophyll cells, which liberate malic acid at night time, are of :

• C₄ - plants

• C₃ - plants

• C₂ - plants

• C₁ - plants

What is the structural element of cell wall?

• Matrix

• Microtubules

• Microfibrils

• Arabinogalactans

The Gram (-) bacteria detect and respond to the chemicals in their surroundings by

• muramic acid

• lipopolysaccharide

• volutin granules

• porin

Small particles projecting from the inner membranes and cristae of mitochondria are known as

• myeloid bodies

• microsomes

• informosomes

• oxysomes

The resolving power of a compound light microscope will be greatest if the source of light is

• blue

• green

• yellow

• red

Primary and secondary active transport both

• generate ATP

• use ATP directly

• can move solutes against their concentration gradient

• include the passive movement of glucose molecule

Which type of membrane is most abundant within a cell?

• ER membrane

• Nuclear membrane

• Golgi membrane

• Plasma membrane

138.

In which method of transport, in plasma membrane does not require carrier molecule?

• Active transport

• Facilitated diffusion

• Simple diffusion

• Na⁺ - K⁺ pump

Which structure is present in both prokaryotic and eukaryotic plant cells?

• Cell wall

• Nucleus

• Chloroplast

• Mitochondria

What is telomere? State its function.