Biology Questions: Paper - 7

Biology Model Question Paper - 7

1.

The characteristic that is shared by urea, uric acid and ammonia is/are
A. They are nitrogenous wastes
B. They all need very large amount of water for excretion
C. They are all equally toxic
D. They are produced in the kidneys
(A) A and D
(B) A, C and D
(C) A only
(D) A and C

Answer: (C)

2.

The 2005 Nobel Prize for Physiology / Medicine was awarded to Barry Marshall and Robin Warren of Australia for their discover of ________.
(A) human papilloma virus causing cervical cancer
(B) bacterium Helicobacter pylori causing peptic ulcer
(C) prions, a new biological principle of infection
(D) Human Immunodeficiency Virus

Answer:  (B)

3.

The main aim of the human genome project is _______.
(A) to identify and sequence all the genes present in human DNA.
(B) to introduce new genes into humans.
(C) to remove disease causing genes from human DNA.
(D) to develop better techniques for comparing two different human DNA samples.

Answer: (A)

4.

The lactase hydrolyzes lactose into
(A) Glucose
(B) Glucose and galactose
(C) Fructose
(D) Glucose and fructose

Answer: (B)

5.

Tetany is caused by
(A) Hyperparathyroidism
(B) Hypoparathyroidism
(C) Hyperthyroidism
(D) Hypothyroidism

Answer: (B)

6.

The agents which are known to cause CJD are
(A) A class of bacteria
(B) A class of viruses
(C) Fungi
(D) Protein particles

Answer: (D)

7.

The loosely arranged non-chlorophyllous parenchyma cells present in lenticels are called
(A) Complementary cells
(B) Passage cells
(C) Water stomata
(D) Albuminous cells

Answer:  (A)

8.

The greatest threat to genetic diversity in agricultural crops is
(A) extensive mixed cropping
(B) introduction of high yielding varieties
(C) extensive use of fertilisers
(D) extensive use of insecticides and pesticides

Answer: (D)

9.

The gene of sickle cell anaemia is inherited by
(A) Blood cells
(B) Bone cells
(C) Sex chromosomes
(D) Autosomes

Answer: (D)

10.

The Gastrin is secreted from
(A) Intestine
(B) Stomach
(C) Pancreas
(D) Rectum

Answer: (B)

11.

The force responsible for upward conduction of water against gravity comes from
(A) transpiration
(B) photosynthesis
(C) translocation
(D) respiration

Answer:  (A)

12.

The cause of cretinism is
(A) Hypothyroidism
(B) Hypoparathyroidism
(C) Hyperthyroidism
(D) Hyperparathyroidism

Answer: (A)

13.

The brainstem is made up of
(A) Midbrain, pons, cerebellum
(B) Midbrain, pond, medulla oblongata
(C) Diencephalon, medulla oblongata, cerebellum
(D) Cerebellum, cerebrum, medulla oblongata

Answer:  (B)

14.

The anterior V-spot in microfilaria of Wuchereria represents
(A) Nerve ring
(B) Cervical papilla
(C) Excretory system
(D) Reproductive

Answer: (C)

15.

The amount of CSF in the cranial cavity
(A) 500 ml
(B) 140 ml
(C) 1 litre
(D) 1.5 ml

Answer: (B)