BIOLOGY SET-1

Question 1:

Which of the following statements about DNA is/are correct?
I. DNA is the hereditary material of all living organisms.
II. All segments of DNA code for synthesis of proteins.
III. Nuclear DNA is double helical with two nucleotide chains which run antiparallel.
IV. DNA is also found in mitochondria.
Select the correct answer using the codes given below.

I, II and III

III and IV

I, III and IV

Only IV

Question 2:

The nucleosome is

histone proteins.

DNA wrapped around histones.

RNA wrapped around histones.

DNA wrapped around acidic protein.

Question 3:

Down’s syndrome is due to:

chromosome number increase in 21st pair autosomes.

chromosome number decreases in the 21st pair autosome.

chromosome number increases in the 18th pair autosome.

chromosome number decreases in 18th pair autosome

Question 4:

Gemmule formation in sponges is useful in:

asexual reproduction

sexual reproduction

parthenogenesis

parthenocarpy

Question 5:

Match List I (Endocrine Gland) with List II (Hormone) and select the correct answer using codes given below the lists.
List I - List II
A. Gonads - 1. Insulin
B. Pituitary - 2. Progesterone
C. Pancreas - 3. Growth hormone
D. Adrenal - 4. Cortisol
Codes- A B C D

3 2 4 1

2 3 4 1

2 3 1 4

3 2 1 4

Question 6:

A surge of which hormone stimulates ovulation in human females?

Luteinizing hormone

Oestrogen

Follicle stimulating hormone

Progesterone

Question 7:

Body temperature is regulated by:

thalamus

hypothalamus

cerebellum

medulla

Question 8:

Insectivorous plants are prominently found in the areas where the soil is deficient in:

Nitrogen

Potassium

Sodium

Magnesium

Question 9:

Which of the following statements about smooth muscles is/are correct?
a. Smooth muscles are involuntary in nature.
b. They are visceral, which means that blood lining is present.
c. They are smooth, spindle, branched and multinucleated

A and b

A, b and c

B and c

A and c

Question 10:

The correct order of holozoic nutrition in humans is:

Digestion > absorption > ingestion > assimilation > egestion

Ingestion > digestion > absorption > assimilation > egestion

Absorption > ingestion > assimilation > egestion > digestion

Egestion > absorption > assimilation > digestion > ingestion

Question 11:

Which of the following statements is correct?

CNS composed of brain and cranial nerves.

PNS composed of cranial nerves and spinal nerves.

There are 31 spinal nerves in humans.

There are 10 pair of cranial nerves in humans.

Question 12:

The causing agent of Warts disease is:

Virus

Bacteria

Protozoa

Fungi

Question 13:

Consider the following statements about flora conservation.
1. Botanical gardens and seed banks are examples of in situ conservation.
2. In cryogenic conservation, the genes/tissues/cells are conserved in liquid nitrogen at low temperature.
Which of the above is/are not correct?

1 only

2 only

Both 1 and 2

None

Question 14:

Golgi bodies are found attached to:

ER

Vacuoles

Nucleus

Mitochondria

Question 15:

Which of the following parts of the brain helps in the exchange of the information between cerebrum and cerebellum ?

Medulla

Cerebellum

Pons

Thalamus