Which of the following are found in extreme saline conditions?

1. Archaebacteria

2. Eubacteria

3. Cyanobacteria

4. Mycobacteria

Which one of the following statements is correct with reference to enzymes?

1. Holoenzyme= Apoenzyme+Coenzyme

2. Coenzyme= Apoenzyme+Holoenzyme

3. Holoenzyme= Coenzyme+ CO-factor

4. Apoenzyme=Holoenzyme+Coenzyme

A decrease in blood pressure/volume will not cause the release of?

1. Atrial natriuretic factor

2. Aldosterone

3. ADH

4. Renin

Which cells of "Crypts of Lieberkühn" secrete antibacterial lysozyme?

1. Paneth cells

2. Zymogen cells

3. Kupffer cells

4. Argentaffin cells

Which of the following are not polymeric?

Functional megaspore in an angiosperm develops into:

Myelin sheath is produced by:

1. Astrocytes and Schwann cells

2. Oligodendrocytes and Osteoclasts

3. Osteoclasts and Astrocytes

4. Schwann cells and Oligodendrocytes

Attractants and rewards are required for:

1. Entomophily

2. Hydrophily

3. Cleistogamy

4. Anemophily

Receptor sites for neurotransmitters are present on:

1. Pre-synaptic membrane

2. Tips of axons

3. Post-synaptic membrane

4. Membrane of synaptic vesicles

Coconut fruit is a:

1. Berry

2. Nut

3. Capsule

4. Drupe