Major Competitive Exams

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Major Competitive Exams

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Major Competitive Exams MCQ & Objective Questions

Major Competitive Exams play a crucial role in shaping the academic and professional futures of students in India. These exams not only assess knowledge but also test problem-solving skills and time management. Practicing MCQs and objective questions is essential for scoring better, as they help in familiarizing students with the exam format and identifying important questions that frequently appear in tests.

What You Will Practise Here

Key concepts and theories related to major subjects
Important formulas and their applications
Definitions of critical terms and terminologies
Diagrams and illustrations to enhance understanding
Practice questions that mirror actual exam patterns
Strategies for solving objective questions efficiently
Time management techniques for competitive exams

Exam Relevance

The topics covered under Major Competitive Exams are integral to various examinations such as CBSE, State Boards, NEET, and JEE. Students can expect to encounter a mix of conceptual and application-based questions that require a solid understanding of the subjects. Common question patterns include multiple-choice questions that test both knowledge and analytical skills, making it essential to be well-prepared with practice MCQs.

Common Mistakes Students Make

Rushing through questions without reading them carefully
Overlooking the negative marking scheme in MCQs
Confusing similar concepts or terms
Neglecting to review previous years’ question papers
Failing to manage time effectively during the exam

FAQs

Question: How can I improve my performance in Major Competitive Exams?
Answer: Regular practice of MCQs and understanding key concepts will significantly enhance your performance.

Question: What types of questions should I focus on for these exams?
Answer: Concentrate on important Major Competitive Exams questions that frequently appear in past papers and mock tests.

Question: Are there specific strategies for tackling objective questions?
Answer: Yes, practicing under timed conditions and reviewing mistakes can help develop effective strategies.

Start your journey towards success by solving practice MCQs today! Test your understanding and build confidence for your upcoming exams. Remember, consistent practice is the key to mastering Major Competitive Exams!

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Q. Which structure increases the surface area for absorption in the small intestine? (2022)

A. Villi
B. Microvilli
C. Plicae circulares
D. All of the above

Solution

All of the above structures (villi, microvilli, and plicae circulares) increase the surface area for absorption in the small intestine.

Correct Answer: D — All of the above

Q. Which structure is found in plant cells but not in animal cells?

A. Cell membrane
B. Mitochondria
C. Chloroplasts
D. Ribosomes

Solution

Chloroplasts are found in plant cells and are responsible for photosynthesis, while animal cells do not have them.

Correct Answer: C — Chloroplasts

Q. Which structure is found only in plant cells?

A. Mitochondria
B. Chloroplast
C. Nucleus
D. Ribosome

Solution

Chloroplasts are the organelles responsible for photosynthesis and are found only in plant cells.

Correct Answer: B — Chloroplast

Q. Which structure is involved in the modification and packaging of proteins?

A. Nucleus
B. Golgi apparatus
C. Ribosome
D. Endoplasmic Reticulum

Solution

The Golgi apparatus modifies, sorts, and packages proteins for secretion or use within the cell.

Correct Answer: B — Golgi apparatus

Q. Which structure is involved in the synthesis of lipids? (2022)

A. Rough ER
B. Smooth ER
C. Golgi apparatus
D. Lysosome

Solution

The smooth endoplasmic reticulum (Smooth ER) is involved in the synthesis of lipids and detoxification processes.

Correct Answer: B — Smooth ER

Q. Which structure is responsible for controlling the activities of the cell? (2019)

A. Cell wall
B. Nucleus
C. Cytoplasm
D. Ribosome

Solution

The nucleus controls the activities of the cell by regulating gene expression.

Correct Answer: B — Nucleus

Q. Which structure is responsible for controlling the entry and exit of substances in a cell? (2022)

A. Cell wall
B. Plasma membrane
C. Cytoplasm
D. Nucleus

Solution

The plasma membrane regulates the movement of substances in and out of the cell, maintaining homeostasis.

Correct Answer: B — Plasma membrane

Q. Which structure is responsible for maintaining the shape of plant cells? (2021)

A. Cell membrane
B. Cell wall
C. Cytoplasm
D. Chloroplast

Solution

The cell wall provides structural support and maintains the shape of plant cells.

Correct Answer: B — Cell wall

Q. Which structure is responsible for packaging and modifying proteins? (2020)

A. Nucleus
B. Golgi apparatus
C. Lysosome
D. Vesicle

Solution

The Golgi apparatus is responsible for packaging and modifying proteins before they are sent to their destination.

Correct Answer: B — Golgi apparatus

Q. Which structure is responsible for packaging and transporting proteins?

A. Lysosome
B. Golgi apparatus
C. Rough endoplasmic reticulum
D. Nucleus

Solution

The Golgi apparatus is responsible for packaging and transporting proteins to their destinations.

Correct Answer: B — Golgi apparatus

Q. Which structure is responsible for photosynthesis in plant cells? (2021)

A. Mitochondria
B. Chloroplast
C. Ribosome
D. Vacuole

Solution

Chloroplasts are the organelles responsible for photosynthesis, converting light energy into chemical energy.

Correct Answer: B — Chloroplast

Q. Which structure is responsible for pollen production? (2020)

A. Ovary
B. Anther
C. Style
D. Stigma

Solution

The anther is the part of the stamen that produces pollen.

Correct Answer: B — Anther

Q. Which structure is responsible for the synthesis of ATP? (2022)

A. Chloroplast
B. Mitochondria
C. Nucleus
D. Golgi apparatus

Solution

Mitochondria are responsible for the synthesis of ATP through cellular respiration.

Correct Answer: B — Mitochondria

Q. Which structure is responsible for the synthesis of lipids? (2021)

A. Smooth endoplasmic reticulum
B. Rough endoplasmic reticulum
C. Golgi apparatus
D. Mitochondria

Solution

The smooth endoplasmic reticulum is involved in the synthesis of lipids and detoxification processes.

Correct Answer: A — Smooth endoplasmic reticulum

Q. Which structure is responsible for the synthesis of ribosomal RNA? (2021)

A. Nucleus
B. Nucleolus
C. Ribosome
D. Endoplasmic reticulum

Solution

The nucleolus is the site within the nucleus where ribosomal RNA (rRNA) is synthesized.

Correct Answer: B — Nucleolus

Q. Which structure is responsible for the transport of sperm? (2020)

A. Urethra
B. Vas deferens
C. Seminal vesicle
D. Prostate gland

Solution

The vas deferens is responsible for the transport of sperm from the epididymis to the ejaculatory duct.

Correct Answer: B — Vas deferens

Q. Which structure is selectively permeable and regulates the entry and exit of substances in a cell?

A. Cell wall
B. Plasma membrane
C. Nuclear membrane
D. Cytoplasm

Solution

The plasma membrane is selectively permeable, allowing certain substances to pass while blocking others.

Correct Answer: B — Plasma membrane

Q. Which structure prevents the backflow of food from the stomach to the esophagus? (2020)

A. Pyloric sphincter
B. Cardiac sphincter
C. Ileocecal valve
D. Anal sphincter

Solution

The cardiac sphincter, also known as the lower esophageal sphincter, prevents the backflow of food from the stomach to the esophagus.

Correct Answer: B — Cardiac sphincter

Q. Which structure protects the developing seeds in a flowering plant? (2021)

A. Ovary
B. Anther
C. Filament
D. Pistil

Solution

The ovary protects the developing seeds and will mature into the fruit after fertilization.

Correct Answer: A — Ovary

Q. Which substituent has both +M and -I effects?

A. -OH
B. -NH2
C. -COOH
D. -NO2

Solution

-NH2 has a +M effect due to resonance donation and a -I effect due to electronegativity.

Correct Answer: B — -NH2

Q. Which substituent is a strong +I and +M director?

A. -NO2
B. -OH
C. -CN
D. -COOH

Solution

-OH is a strong +I and +M director due to its ability to donate electron density through resonance.

Correct Answer: B — -OH

Q. Which substituent is a strong +M director?

A. -CHO
B. -NO2
C. -OH
D. -Br

Solution

The -OH group is a strong +M director due to its ability to donate electron density through resonance.

Correct Answer: C — -OH

Q. Which synchronization mechanism uses a variable to control access to a shared resource?

A. Semaphore
B. Mutex
C. Monitor
D. Condition variable

Solution

A semaphore is a synchronization mechanism that uses a variable to control access to a shared resource.

Correct Answer: A — Semaphore

Q. Which system in the body is primarily responsible for fighting infections?

A. Nervous System
B. Digestive System
C. Immune System
D. Respiratory System

Solution

The immune system is primarily responsible for fighting infections.

Correct Answer: C — Immune System

Q. Which system is primarily responsible for hormone production? (2021)

A. Nervous system
B. Endocrine system
C. Respiratory system
D. Muscular system

Solution

The endocrine system is primarily responsible for hormone production and regulation in the body.

Correct Answer: B — Endocrine system

Q. Which system is primarily responsible for movement in the body?

A. Nervous system
B. Muscular system
C. Skeletal system
D. Circulatory system

Solution

The muscular system is responsible for movement by contracting and relaxing muscles.

Correct Answer: B — Muscular system

Q. Which system is responsible for hormone production in the body?

A. Nervous system
B. Endocrine system
C. Circulatory system
D. Muscular system

Solution

The endocrine system is responsible for producing and secreting hormones that regulate various bodily functions.

Correct Answer: B — Endocrine system

Q. Which system is responsible for hormone production?

A. Nervous system
B. Endocrine system
C. Circulatory system
D. Muscular system

Solution

The endocrine system is responsible for producing and secreting hormones that regulate various bodily functions.

Correct Answer: B — Endocrine system

Q. Which system is responsible for movement in the body?

A. Nervous system
B. Muscular system
C. Skeletal system
D. Circulatory system

Solution

The muscular system is responsible for movement in the body, working in conjunction with the skeletal system.

Correct Answer: B — Muscular system

Q. Which system is responsible for producing hormones in the body?

A. Nervous system
B. Endocrine system
C. Muscular system
D. Skeletal system

Solution

The endocrine system produces hormones that regulate various functions in the body.

Correct Answer: B — Endocrine system

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