CBSE

1. Which one thing is not true about antibiotics?

First antibiotic was discovered by Alexander Flemming

Each antibiotic is effective only against one particular kind of germ

The term "antibiotic" was coined by Selman Waksman in 1942?

Some persons can be allergic to a particular antibiotic

Question 1 of 21

2. Gel electrophoresis is used for?

construction of recombinant DNA by joining with cloning vectors

isolation of DNA molecule

cutting of DNA into fragments

separation of DNA fragments according to their size

Question 2 of 21

3. The Ti plasmid is often used for making transgenic plants. This plasmid is found in?

Agrobacterium

Yeast as a 2 m plasmid

Azotobacter

Rhizobium of the roots of leguminous plants

Question 3 of 21

4. Introduction of food plants developed by genetic engineering is not desirable because?

there is danger of introduction viruses and toxins with introduced crop

these products are less tasty as compared to the already existing products

this method is costly

economy of developing countries may suffer

Question 4 of 21

5. Human insulin is being commercially produced from a transgenic species of?

Escherichia

Rhizobium

Saccharomyces

Bacterium

Question 5 of 21

6. Consider the following statements about biomedical technologies.

(A) During open heart surgery blood is circulated in the heart-lung machine.

(B) Blockage in coronary arteries is removed by angiography.

(D) X-ray provides clear and detailed images of organs like prostate glands and lungs.

Which two of the above statements are correct?

C and D

A and B

B and C

A and C

Question 6 of 21

7. Which one of the following is being tried in India as a bio fuel substitute for fossil fuels?

Jatropha

Azadirachta

Aegilops

Musa

Question 7 of 21

8. Farmers in a particular region were concerned that per-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?

Treatment of the plants with cytokinins along with a small dose of nitrogenous fertilizer

Application of iron and magnesium to promote synthesis of chlorophyll

Removal of all yellow leaves and spraying the remaining green leaves with 2, 4, 5-trichlorophenoxy acetic acid

Frequent irrigation of the crop

Question 8 of 21

9. Main objective of production/ use of herbicide resistant GM crops is to?

reduce herbicide accumulation in food particles for health safety

eliminate weeds from the field without the use of manual labor

encourage Eco-friendly herbicides

eliminate weeds from the field without the use of herbicides

Question 9 of 21

10. Which of the micro-organism is used for production of citric acid in industries?

Lactobacillus bulgaris

Penicillium citrinum

Aspergillus niger

Rhizopus nigricans

Question 10 of 21

11. In a standard ECG which one of the following alphabets is the correct representation of the respective activity of the human heart?

S-start of systole

R-polarization of ventricles

T-end of diastole

P-depolarization of the atria

Question 11 of 21

12. What is antisense technology?

When a piece of RNA that is complementary in sequence is used to stop expression of a specific gene

RNA polymerase producing DNA

Production of monoclonal variants in tissue cultures

A cell displaying a foreign antigen used for synthesis of antigens

Question 12 of 21

13. Two bacteria found to be very useful in genetic engineering experiments are?

Nitrosomonas and Klebsiella

Escherichia and Agrobacterium

Rhizobium and Diplococcus

Nitrobacter and Azotobacter

Question 13 of 21

14. A transgenic food crop which may help in solving the problem of night blindness in developing countries is?

Golden rice

starlink maize

Flavr savr tomatoes

Bt soybean

Question 14 of 21

15. Polyethylene glycol method is used for?

seedless fruit production

biodiesel production

gene transfer without a vector

energy production from sewage

Question 15 of 21

16. Which one of the following proved effective for biological control of nematodal diseases in plants?

Pisolithus tinctorius

Paecilomyces lilacinus

Gliocladium virens

Pseudomonas cepacia

Question 16 of 21

17. Cry-I endotoxins obtained from Bacillus thuringiensis are effective against?

boll worms

flies

nematodes

mosquitoes

Question 17 of 21

18. Which of the following plant species you would select for the production of bio ethanol?

Polygamist

Brassica

Zea mays

Jatropha

Question 18 of 21

19. The technique of obtaining large number of plantlets by tissue culture method is called?

organ culture

macro-propagation

micro-propagation

plantlet culture

Question 19 of 21

20. An important step in the manufacture of pulp for paper industry from the woody tissues of plants is the?

treatment of wood with chemical that breakdown cellulose

preparation of pure cellulose by removing lignin

removal of oils present in the wood by treatment with suitable chemicals

removal of water from the wood by prolonged heating at approximately 50 C

Question 20 of 21

21. What is the best pH of the soil for cultivation of plants?

6.5 __ 7.5

4.5 __ 8.5

5.5 __ 6.5

3.4 __ 5.4

Question 21 of 21

Test Name	CBSE Biology in Human Welfare Test
Subject	CBSE Biology
Test Type	MCQs
Total Question	21
Total Marks	42
Total Time	20 Minutes
Test Help For	CBSE Biology. CBSE Board Exams. Entrance Exams. Admissions Test. Jobs Test. General Knowledge. All Grades Exams.

Test By Subject	CBSE
Test By Topics	Biology in Human Welfare

Test Advisor

CBSE Biology in Human Welfare Test Online

CBSE Biology in Human Welfare Test Online

CBSE

Leave a Reply Cancel reply