Hormone inducing fruit ripening is

• Cytokinin

• Ethylene

• Aabscissic acid

• Gibberellic acid

Which one out of (a) to (d) given below correctly represents the structural formula of the basic amino acid?

Which of the following plant keeps its stomata open during night and closed during the day?

• Orchid

• Cactus

• Tea

• Wheat

Which one of the following structural formula of two organic compounds is correctly identified along with its related function?

• B-uracil – a component of DNA

• A-triglyceride – major source of energy

• A-lecithin – a component of cell membrane

• B-adenine – a nucleotide that makes up nucleic

Given below is a schematic break-up of the phases/stages of cell cycle. Which one of the following is the correct indication of the stage/ phase in the cell cycle?

• C-karyokinesis

• S-synthetic phase

• A-cytokinesis

• B-metaphase

Which of the following characteristics is are exhibited by C₄ -plants?

I. Kranz anatomy.
II. The first product of photosynthesis is oxaloacetic acid.
III. Both PEP carboxylates and ribulose biphosphate carboxylate act as carboxylating enzymes.

The correct option is

• I and III, but not ll

• I and II, but not III

• II and III, but not I

• ll and III

Genetic dwarfism can be overcome by

• Gibberellin

• Ethylene

• Auxin

• ABA

In photosynthesis carbon dioxide is converted to carbohydrates. It is a process.

• Reductive

• Oxidative

• Catabolic and exergonic

• None of the above

Which of the following properties is shown by cytokinins?

• Delay leaf senescence

• Cause leaf abscission

• Promote seed dormancy

• Promote stornatal closing

Which of the following is not an auxin?

• IM

• IBA

• Zeatin

• NM