Q. A snack contains 200 calories, with 10 grams of protein, 20 grams of carbohydrates, and 5 grams of fat. What percentage of the total calories comes from protein? (2019)
A.
10%
B.
20%
C.
25%
D.
30%
Solution
Calories from protein = 10g * 4 = 40 calories. Percentage = (40/200) * 100 = 20%.
Q. If a certain disease has a basic reproduction number (R0) of 3, how many people can one infected person potentially infect in a population without immunity? (2023)
A.
1
B.
2
C.
3
D.
4
Solution
If R0 = 3, one infected person can potentially infect 3 other people in a population without immunity.
Q. If a disease has a 30% chance of being transmitted from an infected person to a healthy person, what is the probability that it will not be transmitted? (2021)
A.
0.7
B.
0.3
C.
0.5
D.
0.2
Solution
The probability that the disease will not be transmitted = 1 - 0.3 = 0.7.
Q. If a disease spreads at a rate of 10% per week, what will be the total percentage of the population infected after 3 weeks, assuming no recovery? (2021)
A.
30%
B.
33%
C.
27%
D.
25%
Solution
Total infected after 3 weeks = 10% + 10% of (100% - 10%) + 10% of (100% - 20%) = 10% + 9% + 8% = 27%.
Q. If a disease spreads at a rate of 3% per week, what will be the total percentage of the population infected after 4 weeks, assuming no recovery? (2021)
A.
12.36%
B.
10.5%
C.
11.5%
D.
15%
Solution
Using the formula for compound growth: Total infected = 100 × (1 - (1 - 0.03)^4) = 100 × (1 - 0.88) = 12.36%.
Q. If a food label states that a serving contains 5 grams of sugar and the daily recommended intake is 25 grams, what percentage of the daily intake does one serving represent?
Q. If a meal contains 40 grams of carbohydrates, 10 grams of protein, and 5 grams of fat, how many total calories does it provide? (Carbohydrates = 4 cal/g, Protein = 4 cal/g, Fat = 9 cal/g)
Q. If a meal contains 50 grams of carbohydrates, 20 grams of protein, and 10 grams of fat, what is the total caloric value of the meal? (Carbohydrates = 4 cal/g, Protein = 4 cal/g, Fat = 9 cal/g) (2023)
Q. If a pea plant with genotype Rr (round seeds) is crossed with another pea plant with genotype rr (wrinkled seeds), what is the probability of obtaining a round-seeded plant?
A.
0%
B.
25%
C.
50%
D.
75%
Solution
The possible genotypes from the cross Rr x rr are Rr and rr. Thus, the probability of obtaining a round-seeded plant (Rr) is 50%.
Biology is a crucial subject for students preparing for school exams and competitive tests in India. Understanding biological concepts not only helps in grasping the fundamentals of life sciences but also enhances your ability to tackle objective questions effectively. Practicing MCQs and objective questions in Biology is essential for scoring better, as it allows you to apply your knowledge and identify important questions that frequently appear in exams.
What You Will Practise Here
Cell Structure and Function
Genetics and Heredity
Human Anatomy and Physiology
Plant Biology and Ecology
Microbiology and Biotechnology
Evolution and Biodiversity
Important definitions and key formulas
Exam Relevance
Biology is a significant part of the curriculum for CBSE, State Boards, NEET, and JEE. In these exams, you can expect a variety of question patterns, including multiple-choice questions that test your understanding of key concepts, definitions, and applications of biological theories. Familiarity with important Biology MCQ questions will give you an edge in both school assessments and competitive exams.
Common Mistakes Students Make
Confusing similar terms, such as mitosis and meiosis.
Overlooking the importance of diagrams in understanding processes.
Misinterpreting questions that require application of concepts rather than rote memorization.
Neglecting to review key definitions and their implications.
FAQs
Question: What are the best ways to prepare for Biology MCQs? Answer: Regular practice with objective questions, reviewing key concepts, and understanding diagrams are effective strategies.
Question: How can I improve my accuracy in answering Biology objective questions? Answer: Focus on understanding concepts rather than memorizing facts, and practice with past exam papers to familiarize yourself with question patterns.
Start solving practice MCQs today to test your understanding and boost your confidence in Biology. Remember, consistent practice is the key to mastering this subject and achieving your exam goals!
Soulshift Feedback×
On a scale of 0–10, how likely are you to recommend
The Soulshift Academy?
