51.

The water potential of pure water is

• Zero

• Less than zero

• More than zero but less than one

• More than zero but less than one

Identify the wrong statement in context of heartwood.

• Organic compounds are deposited in it

• It is highly durable

• It conducts water and minerals efficiently

• It conducts water and minerals efficiently

Double fertilization is exhibited by

• Gymnosperms

• Algae

• Fungi

• Fungi

What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis?

• The larger the fragment size, the farther it moves

• The smaller the fragment size, the farther it moves

• Positively charged fragments move to farther end

• Positively charged fragments move to farther end

Attractants and rewards are required for

• Anemophily

• Entomophily

• Hydrophily

• Hydrophily

The final proof for DNA as the genetic material came from the experiments of

• Griffith

• Hershey and Chase

• Avery, Mcleod and McCarty

• Avery, Mcleod and McCarty

During DNA replication, Okazaki fragments are used to elongate

• The leading strand towards replication fork

• The lagging strand towards replication fork

• The leading strand away from replication fork

• The leading strand away from replication fork

Which of the following are not polymeric?

• Nucleic acids

• Proteins

• Polysaccharides

• Polysaccharides

The region of Biosphere Reserve which is legally protected and where no human activity is allowed is known as

• Core zone

• Buffer zone

• Transition zone

• Transition zone

A dioecious flowering plant prevents both:

• Autogamy and xenogamy

• Autogamy and geitonogamy

• Geitonogamy and xenogamy

• Geitonogamy and xenogamy