Viral envelope contains

(1) lipids

(2) proteins

(3) carbohydrates

(4) all of these

Which of the following is a DNA containing double shelled virus?

(1) Hepatitis A

(2) Hepatitis B

(3) Hepatitis C

(4) Hepatitis D

Azolla increases soil fertility of

(1) maize

(2) barley

(3) rice

(4) wheat

Saprotrophs live on dead organic matter, which they utilize

(1) by phagocytosis

(2) after digestion by extracellular enzymes synthesised by them

(3) by endocytosis

(4) by pinocytosis

Select the option that correctly identifies the different genera (A, B, C and D) of Kingdom Fungi shown in figure.

The protists have

(1) only free nucleic acid aggregates

(2) membrance bound nucleoproteins lying embedded in the cytoplasm

(3) nucleoprotein in direct contact with the rest of the cell substance

(4) none of these

In prokaryotes, genetic recombination can occur during

(1) transduction

(2) transformation

(3) conjugation

(4) all of these

which of the following structures helps in the respiration of lichens?

(1) Soredia

(2) Isidia

(3) Cyphella

(4) Cephalodia

Viroids have

(1) single stranded RNA not enclosed by protein coat

(2) single stranded DNA not enclosed by protein coat

(3) double straded DNA enclosed by protein coat

(4) double stranded RNA enclosed by protein coat

Which one of the following pairs is correctly matched?