INSIGHT UPSC QUIZ

Consider the following statements: 

1. The aperture of the pupil of a human eye can be changed with the help of the ciliary muscles. 

2. The curvature of human eye cannot be changed, because the lens of a human eye is fixed. 

Which of the statements given above is/are correct?

Read the following statements carefully and select the correct answer from codes given below:

1. The phenomenon of splitting of white light into its seven component colours by a prism is called dispersion.

2. While passing through a prism, the violet light bends the least while the red the most.

3. Isaac Newton was the first to use a glass prism to obtain the spectrum of sunlight.

Which of the statements given above is/are correct?

 Weeds are unwanted plants in a cultivated field. In this context, consider the following statements:

1. The weeds compete for food, space and light.

2. Weeds are responsible for affecting the growth of the crop.

3. Timely sowing of crops and crop rotation help in weed control.

Which of the statement(s) given above is/are correct?

Consider the following statements about ‘Biochemical Oxygen Demand’ (BOD):

1. It is the amount of oxygen required by bacteria to break down the organic matter present in a certain volume of a sample of water.

2. Highly polluted water have BOD value of less than 5 ppm. 

Which of the statements given above is/are correct?

The twinkling of a star occurs due to atmospheric refraction of starlight. This twinkling phenomenon occurs only in stars and not in planets, it is because of which of the following reasons?

Which of the following diseases and their causative agents is NOT correctly matched? 

Select the correct answer using codes given below:

Consider the following statements: 

1. The ‘danger’ signal lights are red in colour as the red is least scattered by fog or smoke.

2. The sky appears dark to passengers flying at very high altitudes because of scattering of light. 

Which of the statements given above is/are correct?

Which of the following statement(s) is/are correct?

1. The B-lymphocytes in human body produce an army of proteins in response to pathogens into our blood to fight with them. 

2. The T-lymphocytes mediate cell-mediated immunity (CMI) which is responsible for the graft (transplanted body-part) rejection. 

Select the correct answer using the code given below.

Consider the following statements about the ‘scattering of light’: 

1. Very fine particles scatter mainly blue light while particles of larger size scatter light of longer wavelengths. 

2. If the size of the scattering particles is large enough, then, the scattered light may even appear white. 

Which of the statements given above is/are correct?

 In context of ‘Scrub Typhus’, which of the statements given below is/are correct?

1. It is a disease caused by a bacterium and it spreads to people through bites of infected chiggers.

2. Antibiotics are most effective form of medicine to cure this disease.

3. Recently, a special vaccine has been developed for its prevention by the Department of Biotechnology.

Select the correct answer using codes given below: