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Mcqs

Life Sciences Mcqs

Our 1000+ Life Sciences MCQs (Multiple Choice Questions and Answers) focus on all areas of Life Sciences covering 100+ topics. These topics are chosen from a collection of the most authoritative and best reference books on Life Sciences. One should spend 1 hour daily practicing these MCQs for 2-3 months to learn and assimilate the Life Sciences subjects comprehensively. This way of systematic learning will prepare anyone easily for Life Sciences exams, contests, online tests, quizzes, MCQ-tests, viva-voce, interviews, and certifications.

 

Life Sciences Multiple Choice Questions Highlights

  • 1000+ Multiple Choice Questions & Answers (MCQs) in Life Sciences with a detailed explanation of every question.
  • These MCQs cover theoretical concepts, true-false(T/F) statements, fill-in-the-blanks, and match the following style statements.
  • These MCQs also cover numerical as well as diagram-oriented MCQs.
  • These MCQs are organized chapterwise and each Chapter is further organized topicwise.
  • Every MCQ set focuses on a specific topic of a given Chapter in the Life Sciences Subject.

 

Who should Practice Life Sciences MCQs?

  • Students who are preparing for college tests and exams such as mid-term tests and semester tests on Life Sciences.
  • Students who are preparing for Online/Offline Tests/Contests in Life Sciences.
  • Students who wish to sharpen their knowledge of the Life Sciences Subject.
  • Anyone preparing for Aptitude test in Life Sciences.
  • Anyone preparing for interviews (campus/off-campus interviews, walk-in interviews and company interviews).
  • Anyone preparing for entrance examinations and other competitive examinations.
  • All - Experienced, Freshers and College / School Students.

 

Life Sciences Chapters

Here's the list of chapters on the "Life Sciences" subject covering 100+ topics.

  • Biomolecules and Catalysis
  • Bioenergetics and Metabolism
  • Cell Structure and Functions
  • Prokaryotes and Viruses
  • Immunology
  • Diversity of Life
  • Genetics
  • Molecular Genetics
  • Recombinant DNA Technology
  • Plant Physiology
  • Human Physiology
  • Ecology

 

Latest Popular
Q:

Hekistotherm vegetation is found in which of the following region?

A) High temperature B) Very low temperature
C) High temperature with an alternating low temperature D) Low temperature
 
Answer & Explanation Answer: C) High temperature with an alternating low temperature

Explanation: Hekistotherm is found in very low temperature mainly alpine vegetation is dominant in this region. Microtherm is the low temperature where coniferous vegetation is found in dominance.

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Category: Biotech Engineering MCQs
Sub Category: Life Sciences Mcqs

906
Q:

Which of the following is INCORRECT for the lock-and-key model?

A) It is used to describe the binding process B) The active site of the enzyme is complementary to the substrate
C) It demonstrates enzyme-substrate complex D) The binding of the substrate produces a conformational change in enzyme
 
Answer & Explanation Answer: D) The binding of the substrate produces a conformational change in enzyme

Explanation: Lock-and-key model is used to describe the enzyme-substrate complex. It is the binding process where the active site of an enzyme is complementary to the shape of the substrate. The binding of the substrate produces a conformational change in the enzyme is incorrect as the confirmation of enzyme changes only in the induced fit model.

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Category: Biotech Engineering MCQs
Sub Category: Life Sciences Mcqs

901
Q:

A relatively dense layer of band which is found in the thermosphere is known as?

A) Troposphere B) Mesosphere
C) Stratosphere D) Ionosphere
 
Answer & Explanation Answer: D) Ionosphere

Explanation: Thermosphere extends 1000 km above the earth’s crust. Ionosphere is a dense band of charged particles, specifically found in the thermosphere.

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Category: Biotech Engineering MCQs
Sub Category: Life Sciences Mcqs

592
Q:

Embryo initiation is facilitated by___________

A) GA3 B) BPA
C) ABA D) 2,4 D
 
Answer & Explanation Answer: D) 2,4 D

Explanation: 2,4, D is used in higher concentration for embryo initiation while ABA is used for embryo maturation.

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Category: Biotech Engineering MCQs
Sub Category: Life Sciences Mcqs

493
Q:

A purified DNA sample of leaf contains 20.0 mole of guanine. Calculate the approximate percentage of purine residues?

A) 30% B) 40%
C) 60% D) 20%
 
Answer & Explanation Answer: A) 30%

Explanation: According to chargaff’s rules, C=G= 20%; A=T
(A+G) + (T+C) =100%
(A+20) + (T+20) =100%
(A+20) + (A+20) = 100%
2A= 100-40%
A = 30%.

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Category: Biotech Engineering MCQs
Sub Category: Life Sciences Mcqs

463
Q:

Mark the INCORRECT statement about Edward’s syndrome.

A) Trisomy of chromosome 18 B) Mental and motor retardation
C) Dwarfism D) Clenched hand and overlapping fingers
 
Answer & Explanation Answer: C) Dwarfism

Explanation: Edward’s syndrome is the second most common autosomal aneuploidy, which involves trisomy in chromosome 18.

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Category: Biotech Engineering MCQs
Sub Category: Life Sciences Mcqs

449
Q:

The catabolic pathway is exergonic in nature.

A) True B) False
 
Answer & Explanation Answer: A) True

Explanation: Catabolic pathway is the type of a metabolic pathway in which oxidative breakdown of larger complex molecules generates a huge amount of energy. Releasing energy is exergonic process while consuming energy is an endergonic process which can be seen in an anabolic pathway.

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Category: Biotech Engineering MCQs
Sub Category: Life Sciences Mcqs

448
Q:

Which of the following is a diversity index?

A) Upright index B) Inverted index
C) Bell shaped index D) Simpson’s index
 
Answer & Explanation Answer: D) Simpson’s index

Explanation: Diversity index is the measure of diversity of species in the community. Simpson’s and Shannon index are basically used to measure the diversity of the community.

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Category: Biotech Engineering MCQs
Sub Category: Life Sciences Mcqs

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