Practice Test: General Science- 1 | Science & Technology for UPSC CSE PDF Download

Ques 1.To which family does all pulses belong?

Ans: Leguminosae

Pulses

Ques 2. Plants absorb most part of water needed by them through their ________

Ans: Root hairs

Ques 3. Which branch of science is concerned with the study of relationship of plants to their environment?

Ans: Ecology

Ques 4. Radish is a ________

Ans: Modified root

Ques 5. Plants that grow under average conditions of temperature and moisture are called ________

Ans: Mesophytes

Ques 6. The process of photosynthesis is most active in _____

Ans: Red light

  Photosynthesis

Ques 7. Artificial light can ________

Ans:  Bring about photosynthesis

Ques 8. Pedology is the study of ________

Ans: Soil

Ques 9. The stem of water plants usually have ________ 

Ans: A well developed aeronchyma

Ques 10. Plants are killed in winter by frost because ________ 

Ans:  Of dessication and mechanical damage to the tissues

Ques 11. Aquatic plants with floating leaves have ________ 

Ans: Stomata only on upper surface

Floating leaves

Ques 12. Usually when tomatoes are plucked, they are green. They become red later because the ________ 

Ans: Chloroplast gets co nverted into chromoplast

Ques 13. The purpose of growing plants along river banks is to prevent ________ 

Ans: Siltage and floods

Ques 14. Bile secreted by the liver gets stored in the ________ 

Ans: Gall bladder

Ques 15. If a boy’s father has haemophilia and his mother has one gene for it, what is the chance that the boy will inherit the disease ________ 

Ans: 50%

Ques 16. In wrong blood transfusion RBCs at ________ 

Ans: Recipient agglutinase

Ques 17. ________ is not a constituent of DNA molecule?

Ans: Uracil

Structure of Uracil

Ques 18. When the right ventricle in the human heart contracts, the blood moves to ________ 

Ans: Pulmonary arteries

Ques 19. Who is regarded as the Father of Modern Biology? 

Ans: Darwin

Ques 20. Which digestive enzyme is present in the saliva? 

Ans: Ptyalin

Ques 21. The process by which the blood carries the absorbed food products to the tissue cells, where they are taken up, is called ________

Ans: Assimilation

Ques 22. What are Cold-Blooded animals? 

Ans: Animals whose body temperature varies according to the temperature of atmosphere.

Cold Blooded Animals

Ques 23. Which is considered to be the most effective method of returning minerals to the soil? 

Ans: Crop rotation

Ques 24. Most of the red, blue and purple colours of plants are due to a pigment called ________ 

Ans: Anthocyanin

Ques 25. Which is the principal organ of digestion and absorption of food in our body?

Ans:  Small Intestine

Ques 26. Bacterial action changes dead leaves into ________ 

Ans: Humus

Ques 27. A fertile soil, suitable for growing common crops, is likely to have a pH value of ________ 

Ans: Six or seven

Ques 28. If a mouse of over eight times its normal size has been produced by introducing human growth hormone gene, the technique involved is called ________ 

Ans: Genetic Engineering

Genetic Engineering

Ques 29. Poison glands of snakes are homologous to ________

Ans: Salivary glands of vertebrates

Ques 30. Which seed can benefit a patient of diabetes mellitus by normalising his blood sugar level? 

Ans: Fenugreek.

Ques 31. Scratching eases itching because ________ 

Ans:  It stimulates certain nerves which direct the brain to increase the production of anti-histaminic chemicals.

Ques 32. Three communicable diseases prevalent in developing countries caused by unsafe drinking water and bad sanitation are ________

Ans:  Malaria, acute diarrhoea and schistosomiasis.

Ques 33. Plants hormone that induces cell division is ________ 

Ans: Kinin

Ques 34. Cow milk is a rich source of ________ 

Ans: Vitamin A.

Ques 35. The fruit formed without fertilisation is known as ______ 

Ans: Parthenocarpy.
Parthenocarpy FruitsQues 36. The unicellular algae which is used in space programme to regulate the supply of oxygen is ________. 

Ans: Chlorella

Ques 37. Heredity characters are carried to the next generation by ________ .

Ans: Chromosomes

Ques 38. When nitrogenous waste products accumulate in the blood, it is an indication that the ________ .

Ans: Kidneys are not functioning

Ques 39. The use of which devices has given the modern Biologist a better insight into the internal structure of cell ___ .

Ans: Electron microscope 
Electron microscope

Ques 40. The chief value of perspiration is that it ________ .

Ans:  Regulates body temperature

Ques 41. Who is regarded as the “father of genetics”? 

Ans: G.J. Mendel

Ques 42. Milk in its natural form has a certain amount of sugar and that is ________ .

Ans: Lactose

Ques 43. Which is the largest part of the human brain? 

Ans: Cerebrum

Ques 44. Branches of biology deals with the study of birds is ___ 

Ans: Ornithology

Ques 45. A person, who met with an accident, was partially paralysed and lacked a sense of feeling after treatment. Which part of the nervous system was affected by the accident? 
Ans: The spinal cord seemed damaged

Ques 46. Sodium depletion occurs in excessive sweating, and cannot be corrected by drinking water alone. When uncorrected, it may lead to ________ 

Ans: Muscle cramps, loss of energy, fatigue and faintness

Ques 47. Excessive intake of polished rice cause deficiency of _ 

Ans: Vitamin B

Ques 48. In mammals the developing embryo is connected with the placenta by ________ 

Ans: Umbilical cord

Ques 49. In certain diseases antibiotics are administered. The object is to ________

Ans: Inhibit the growth of bacteria

Ques 50. ________ is nearly a complete food by itself.

Ans: Milk