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Topics / Sci & Tech

Biology

Asked 9 times in UPSC Prelims · first asked 1998 · last asked 2020

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All 9 questions

Newest first — expand for options, answers, and explanations

What is the importance of using Pneumococcal Conjugate Vaccines in India? 1. These vaccines are effective against pneumonia as well as meningitis and sepsis 2. Dependence on antibiotics that are not effective against drug-resistant bacteria can be reduced 3. These vaccines have no side effects and cause no allergic reactions Which of the statements given above is/are correct?

2020Sci & Tech
A1 only
B1 and 2 only
C3 only
D1, 2 and 3

Explanation

Pneumococcal Conjugate Vaccines are beneficial in India for several reasons. They offer protection against pneumonia, meningitis, and sepsis, while also helping to lower reliance on ineffective antibiotics for drug-resistant bacteria. Additionally, these vaccines are known to have minimal side effects and do not trigger allergic reactions. The correct statements are that these vaccines are effective against pneumonia as well as meningitis and sepsis, and that dependence on antibiotics that are not effective against drug-resistant bacteria can be reduced.

What is the importance of using Pneumococcal Conjugate Vaccines in India? 1. These vaccines are effective against pneumonia as well as meningitis and sepsis 2. Dependence on antibiotics that are not effective against drug-resistant bacteria can be reduced 3. These vaccines have no side effects and cause no allergic reactions Which of the statements given above is/are correct?

2020Sci & Tech
A1 only
B1 and 2 only
C3 only
D1, 2 and 3

Explanation

Pneumococcal Conjugate Vaccines play a crucial role in India as they are effective against pneumonia, meningitis, and sepsis. By using these vaccines, the reliance on antibiotics that are ineffective against drug-resistant bacteria can be minimized. Additionally, these vaccines are known for their lack of side effects and allergic reactions. The correct statements are 1 and 2, making option (b) the correct answer.

Consider the following statements: 1. Some species of turtles are herbivores 2. Some species of fish are herbivores 3. Some species of marine mammals are herbivores 4. Some species of snakes are viviparous. Which of the statements given above are correct?

2018Sci & Tech
A1 and 3 only
B2, 3 and 4 only
C2 and 4 only
D1, 2, 3 and 4

Explanation

In this question, all the statements provided are accurate. There are species of turtles, fish, and marine mammals that are herbivores, while some species of snakes are viviparous. Therefore, the correct option is (d) 1, 2, 3, and 4.

Consider the following pairs: Vitamin - Deficiency disease 1. Vitamin C : Scurvy 2. Vitamin D : Rickets 3. Vitamin E : Night blindness Which of the pairs given above is/are correctly matched?

2014Sci & Tech
A1 and 2 only
B3 only
C1, 2 and 3
DNone

Explanation

In this question, we are asked to identify the correct pairings of vitamins with their corresponding deficiency diseases. The correct pairs are: Vitamin C with Scurvy, and Vitamin D with Rickets. Deficiency of Vitamin E does not cause night blindness; instead, it is caused by a deficiency of Vitamin A. Therefore, the correct answer is option (a), which includes pairs 1 and 2 only.

Assertion (A): Blood glucose level rises after a meal and falls during fasting. Reason (R): Insulin is a hormone that regulates blood glucose.

2008Sci & Tech
ABoth A and R are correct and R explains A
BBoth A and R are correct but R does not explain A
CA is correct but R is false
DA is false but R is correct

Explanation

Blood sugar levels increase after eating and decrease during fasting. Insulin is a hormone that controls the level of glucose in the blood. Both statements are accurate, and insulin plays a role in regulating the changes in blood sugar levels.

Consider the following statements: 1. Non-functioning of lachrymal gland is an important symptom of deficiency of Vitamin A 2. Deficiency of Vitamin B1 can lead to indigestion and heart enlargement 3. Vitamin C deficiency can lead to pain in the muscles 4. Deficiency of Vitamin D causes increased loss of Ca++ in urine. Which of the statements given above are correct?

2004Sci & Tech
A1 and 2
B2, 3 and 4
C1, 3 and 4
D1, 2, 3 and 4

Explanation

In this set of statements, it is important to note that all of them are correct. Vitamin deficiencies can lead to various symptoms in the body. Vitamin A deficiency can affect the lachrymal gland, Vitamin B1 deficiency can impact digestion and heart health, Vitamin C deficiency can cause muscle pain, and Vitamin D deficiency can result in increased calcium loss through urine. Therefore, the correct answer is option (d), as all the statements are accurate representations of the effects of vitamin deficiencies on the body.

Which one of the following organisms can serve as a biofertilizer for rice crop?

2002Sci & Tech
ABlue-green algae
BRhizobium sp.
CMycorrhizal fungi
DAzotobacter sp.

Explanation

Blue-green algae, such as Anabaena and Nostoc, are capable of fixing atmospheric nitrogen in rice fields, making them suitable biofertilizers for rice crops.

Consider the following statements: 1. Tapeworms are hermaphrodite 2. Round worms have separate sexes 3. Filaria is caused by a nematode 4. Guinea worm is an annelid. Which of the statements given above are correct?

2002Sci & Tech
A1, 2 and 3
B2, 3 and 4
C1, 3 and 4
D1, 2 and 4

Explanation

In the provided statements, tapeworms are confirmed to be hermaphrodites, while roundworms are specified to have separate sexes. Filaria is associated with a nematode known as Wuchereria bancrofti, indicating the correct statement. Additionally, it is clarified that Guinea worm is classified as a nematode and not an annelid. Therefore, the correct statements among the options are 1, 2, and 3, aligning with the classification of these organisms.

Examine the following three statements: 1. Processed meat is a perishable food 2. All perishable foods are packed in sealed tins 3. Sealed tins sometimes do not contain processed meat. Which one of the following inferences can be drawn from the above statements?

1998Sci & Tech
ASealed tins always contain perishable food
BProcessed meat is sometimes not packed in sealed tins
CProcessed meat is always packed in sealed tins
DNon-perishable foods are never packed in sealed tins

Explanation

Analyzing the given statements, it can be concluded that processed meat is consistently packaged in sealed tins.