Which one of the following is a natural growth inhibitor?

• NAA

• ABA

• IAA

• GA

In CAM plants, CO₂ acceptor is

• RuBP

• PEP

• OAA

• PGA

Ginger is an underground stem. It is distinguished from root because

• it lacks chlorophyll

• it stores food

• it has nodes and internodes

• it has xylem and vessels

DCMU 

• inhibits PS- I

• inhibits PS- II

• destroy chloroplast

• inhibits oxidative phosphorylation

Root hair absorbs water from soil through

• turgor pressure

• ion exchange

• osmosis

• DPD

Apical dominance is caused by

• auxin

• gibberellin

• kinetin

• ABA

Which of the following is not caused by deficiency of mineral?

• Chlorosis

• Etiolation

• Shortening of internodes

• Necrosis

A genophore is made up of 

• a single double stranded DNA

• a single stranded DNA

• RNA and histones

• histones and non- histones

During DNA replication in prokaryotes DNA is anchored to

• chromosome

• mesosome

• nucleolus

• ribosome

Iodine is obtained from 

• Laminaria

• Chlorella

• Polysiphonia

• Porphyra