UPSC-CMS 2016 - Biochemistry PYQs Practice Questions

Q: Consider the following statements about content/yield of 100 gm of some foodstuffs: 1. Fat content of Bengal gram is less than that of maize 2. Protein content of maize is more than that of rice 3. Calorie yield of fish and egg is same Which of the statements given above is/are correct?

2 only. ***Correct Answer: 2 only*** **Statement 2 is correct:** Protein content of maize (9-10g per 100g) is indeed more than that of rice (7-8g per 100g). This is an important nutritional distinction for dietary planning. **Why other statements are incorrect:** *Statement 1 is incorrect:* Fat content of Bengal gram (chickpea) is approximately 6g per 100g, while maize (corn) contains about 4.7g per 100g. Therefore, Bengal gram actually has **more** fat content than maize, not less. This makes statement 1 false. *Statement 3 is incorrect:* Calorie yield varies significantly between fish and eggs. Fish provides 100-200 kcal per 100g depending on the type (lean vs. fatty fish), while whole eggs provide approximately 155 kcal per 100g. The variability in fish calorie content makes it inaccurate to state they are "same." **Clinical Relevance:** Understanding macronutrient composition of common food items is essential for providing appropriate dietary counseling and nutritional recommendations in clinical practice. --- *Option A (2 and 3):* Incorrect because statement 3 is false - calorie yields are not the same. *Option C (1 and 2):* Incorrect because statement 1 is false - Bengal gram has more fat than maize. *Option D (1 only):* Incorrect because statement 1 is false, and statement 2 is actually correct. [Practice more Biochemistry PYQs on OnCourse]

Q: Consider the following statements: 1. Protein content of soyabean is more than that of meat (per 100 gm) 2. Fat content of fish is more than that of soyabean (per 100 gm) 3. Calorie yield for each 100 gm of fish is almost the same as for 100 gm of banana 4. Fat content of soyabean is more than that of eggs (per 100 gm) Which of the above statements are correct?

1 and 4 only. ***1 and 4 only*** - **Statement 1 is correct**: Soybean has a significantly higher protein content (approximately 36g/100g) compared to most meats (20-26g/100g for beef, chicken, pork). - **Statement 4 is correct**: Soybean has a higher fat content (approximately 20g/100g) than whole eggs (approximately 10-11g/100g). - **Statement 2 is incorrect**: Fish generally has lower fat content than soybean. Most fish varieties contain 2-10g fat/100g (lean fish like cod: 0.5-2g; moderately fatty fish like salmon: 10-14g), which is less than soybean's 20g/100g. - **Statement 3 is incorrect for exam purposes**: While some very lean fish (cod: ~82 kcal/100g) may be close to banana (89 kcal/100g), most commonly consumed fish provide 100-150 kcal/100g or more, making them significantly higher in calories than banana. The statement's use of "almost the same" is too broad to be considered correct. *1 and 2* - Statement 1 is correct, but statement 2 is incorrect because **fish has less fat than soybean**, not more. *1, 3 and 4* - Statements 1 and 4 are correct, but statement 3 is incorrect because **the calorie yield of most fish varieties (100-150+ kcal/100g) is notably higher than banana (89 kcal/100g)**. Only specific lean fish varieties approach banana's calorie content, which doesn't justify the blanket statement. *2 and 3* - Both statements are incorrect. Statement 2: **fish has less fat than soybean**. Statement 3: **most fish have higher calorie yields than banana**. [Practice more Biochemistry PYQs on OnCourse]

Q: Among the following foodstuffs, which one has the highest protein content per 100 gm?

Black gram. ***Black gram*** - **Black gram (Urad dal)** is a pulse known for its high protein content, typically around **24-25 grams per 100g**. - It is a staple in many cuisines and provides essential amino acids, making it a valuable protein source. *Ragi* - **Ragi (finger millet)** is a nutritious grain, but its protein content is relatively lower, around **7-8 grams per 100g**. - It is more notable for its high **calcium** and **fiber** content rather than protein. *Wheat* - **Wheat** contains a moderate amount of protein, usually around **12-14 grams per 100g**. - While it's a significant source of calories and carbohydrates, its protein content is less than that of black gram. *Egg* - A whole **egg** contains about **13 grams of protein per 100g**. - While eggs are an excellent source of high-quality protein, black gram typically surpasses this amount per 100g. [Practice more Biochemistry PYQs on OnCourse]

Question 1

Consider the following statements about content/yield of 100 gm of some foodstuffs:

1. Fat content of Bengal gram is less than that of maize
2. Protein content of maize is more than that of rice
3. Calorie yield of fish and egg is same

Which of the statements given above is/are correct?

Accepted Answer

2 only

Answer

2 and 3

Answer

1 and 2

Answer

1 only

Question 2

Consider the following statements:

1. Protein content of soyabean is more than that of meat (per 100 gm)
2. Fat content of fish is more than that of soyabean (per 100 gm)
3. Calorie yield for each 100 gm of fish is almost the same as for 100 gm of banana
4. Fat content of soyabean is more than that of eggs (per 100 gm)
Which of the above statements are correct?

Accepted Answer

1 and 4 only

Answer

1 and 2

Answer

1, 3 and 4

Answer

2 and 3

Question 3

Among the following foodstuffs, which one has the highest protein content per 100 gm?

Accepted Answer

Black gram

Answer

Ragi

Answer

Wheat

Answer

Egg

UPSC-CMS 2016 — Biochemistry