UPSC-CMS 2024 - Biochemistry PYQs Practice Questions

Q: Consider the following milks : 1. Buffalo milk 2. Cow milk 3. Goat milk 4. Human milk What is the correct order (from highest to lowest) with regard to fat content per 100 gm in the milk?

1 → 3 → 4 → 2. ***1 → 3 → 4 → 2*** - **Buffalo milk** generally has the highest fat content (around 6-7%), followed by **goat milk** (4.1%), **human milk** (3.8-4.5%), and finally **cow milk** (3.2-3.8%). - This order reflects the typical fat percentage found in these types of milk, which varies based on breed, diet, and individual factors. *2 → 1 → 4 → 3* - This order incorrectly places cow milk as having the highest fat content and goat milk as the lowest, which is not accurate. - Cow milk typically has a lower fat percentage than buffalo milk. *1 → 2 → 3 → 4* - While buffalo milk is correctly identified as having the highest fat content, this order incorrectly places cow milk above goat milk and human milk. - Human milk and goat milk generally have higher fat content than cow milk. *4 → 2 → 3 → 1* - This order places human milk as having the highest fat content, which is incorrect as buffalo milk consistently has a higher fat content. - It also reverses the correct order for buffalo and cow milk. [Practice more Biochemistry PYQs on OnCourse]

Q: Which of the following are unsaturated fatty acids? 1. Lauric acid 2. Linoleic acid 3. Oleic acid 4. Palmitic acid Select the correct answer using the code given below.

2 and 3. ***2 and 3*** - **Linoleic acid** is an **omega-6 fatty acid** with two double bonds, making it polyunsaturated. - **Oleic acid** is an **omega-9 fatty acid** with one double bond, making it monounsaturated. *1 and 4* - **Lauric acid** is a **saturated fatty acid** with no double bonds. - **Palmitic acid** is also a **saturated fatty acid** with no double bonds. *1 and 2* - While **linoleic acid** (2) is unsaturated, **lauric acid** (1) is a saturated fatty acid. - This option incorrectly includes a saturated fatty acid. *3 and 4* - While **oleic acid** (3) is unsaturated, **palmitic acid** (4) is a saturated fatty acid. - This option incorrectly includes a saturated fatty acid. [Practice more Biochemistry PYQs on OnCourse]

Question 1

Consider the following milks :

1. Buffalo milk
2. Cow milk
3. Goat milk
4. Human milk

What is the correct order (from highest to lowest) with regard to fat content per 100 gm in the milk?

Accepted Answer

1 → 3 → 4 → 2

Answer

2 → 1 → 4 → 3

Answer

1 → 2 → 3 → 4

Answer

4 → 2 → 3 → 1

Question 2

Which of the following are unsaturated fatty acids?

1. Lauric acid
2. Linoleic acid
3. Oleic acid
4. Palmitic acid
Select the correct answer using the code given below.

Accepted Answer

2 and 3

Answer

1 and 4

Answer

1 and 2

Answer

3 and 4

UPSC-CMS 2024 — Biochemistry