29 JUNE 2021 | CDS 2021 EXAM QUESTIONS

1) Question

Bacteria are classified as Gram-positive and Gram-negative, based on the

structural difference in their cell walls that is detectable through a staining technique

inclusion of exclusion of mRNA molecules in their cell membrane

functional or dysfunctional status of mitochondria in the cell nucleus

multiplying tendencies across different mediums in a particular host

2) Question

Consider the following statements.

1) Saturated fatty acids are found mainly in food products obtained from plant sources.

2) Natural Trans fatty acids (TFAs) are present in meats and dairy products.

3) TFAs pose a higher risk of heart disease than saturated fats.

Select the correct answer using the codes below.

3 only

2 and 3 only

1 and 2 only

1 and 3 only

3) Question

Ethylene, as a plant growth regulator, primarily plays which of the following roles

Breaking dormancy and inducing ripening in fruits

Protecting seeds from insects and pests

Increasing the hardness of the fruit after separation from the tree

Transporting air and other vital gases from atmosphere to the plant cells

4) Question

With reference to Sickle-cell anaemia, consider the following statements.

1) Red blood cells die earlier when infected with this disease.

2) It is a contagious disease and can be transmitted between close family members.

3) It affects only children.

4) Bone-marrow transplant can be a treatment of this disease.

Select the correct answer using the codes below.

2 and 4 only

1, 2 and 3 only

1 and 4 only

1, 2, 3 and 4

5) Question

Consider the following statements.

1) Measles is highly contagious and spreads through coughing and sneezing of an infected person.

2) Rubella is an infection caused by a virus that does not affect individuals other than children.

Which of the above is/are correct?

1 only

2 only

Both 1 and 2

None