Viruses

Q.

Viruses are considered as an intermediate between living and non-living because;

1. They can never be living

2. The remain inactive outside a host cell

3. Both a & b

4. None of these

Q. Viruses which have only RNA as genetic material are called ___ .

Q. ___ is considered as an intermediate between the living and non-living world.

Q.

Which of the following is matched correctly in the table given below?
$\begin{array}{ccc}& \text{Disease}& \text{Transmission}\\ \text{A.}& \text{AIDS}& \text{Through sexual intercourse}\\ \text{B.}& \text{Malaria}& \text{Through body contact}\\ \text{C.}& \text{Hepatitis A and B}& \text{Through contaminated food.}\end{array}$

1. A only

2. A and B

3. A and C

4. B and C

Q.

With respect to the given statements, choose the correct option.
Statement 1: Viruses are dead when they are outside the host body.
Statement 2: Viruses do not have a cellular organisation.

1. Both the statements are correct

2. Only statement 1 is correct

3. Only statement 2 is correct

4. Both the statements are incorrect

Q.

Viruses are considered as living things/non-living things?

Q.

Why are pathogens harmful?

Q. Vaccine against rabies was first developed by

1. Edward Jenner
2. Alexander Fleming
3. Louis Pasteur
4. Paul Ehrlich

Q. We should not allow mosquitoes to breed in our surroundings because they

1. Multiply very fast and contaminate food
2. Are vectors for many diseases.
3. Bite and cause skin diseases.
4. Are not important insects.

Q. Find out the organism from the given options with these characters:

• Can infect all types of life forms plant, animals and microorganisms.
• They invade living normal cells and use their cell machinery to multiply.

1. Bacteria
2. fungi
3. Protozoa
4. Virus