• Biology Class Test
Back
0

Biology Class Test

Description: This test covers the whole syllabus of CBSE Class XII Biology.
Number of Questions: 15
Created by:
Tags: biology Pollination Related Disorders Auto Immune Diseases Theories and Evidences of Evolution Brief Account of Evolution of Organisms Biodiversity and its Conservation Conservation of Biodiversity Advantages of GM Organisms Transgenic Animals
Start the Quiz
Attempted 0/15 Correct 0 Score 0
‹
›

Which of these refers to the mode of cross pollination performed by birds?

  1. Entomophily

  2. Ornithophily

  3. Chiropterophily

  4. Malacophily

  5. Anemophily

Show answer
Correct Option: B
Explanation:

Ornithophily is the type of cross pollination performed by birds.

Which of these is an autoimmune disease?

  1. AIDS

  2. Tetanus

  3. Ring Worm

  4. Rheumatoid Arthritis

  5. Amoebic Dysentry

Show answer
Correct Option: D
Explanation:

Rheumatoid Arthritis is an autoimmune disease.

Which of these is a method of ex situ conservation?

  1. Zoological Park

  2. National Park

  3. Wildlife Sanctuary

  4. Biosphere Reserve

  5. Sacred Grove

Show answer
Correct Option: A
Explanation:

Zoological Park is a method of ex situ conservation in which animals are kept in captivity out of their natural habitat.

Who proposed the mutation theory of evolution?

  1. Lamarck

  2. Charles Darwin

  3. Hugo de Vries

  4. August Weismann

  5. Aristotle

Show answer
Correct Option: C
Explanation:

Hugo de Vries proposed the mutation theory of evolution.

Which of the following improved traits is observed in golden rice?

  1. Higher protein content

  2. Enriched vitamin A content

  3. Insect resistance

  4. Increased shelf life

  5. Herbicide resistance

Show answer
Correct Option: B
Explanation:

Enriched vitamin A content is found in golden rice.

Which of the following phenomena refers to the development of a fully formed individual directly from an unfertilised ovum?

  1. Spermatogenesis

  2. Oogenesis

  3. Parthenogenesis

  4. Organogenesis

  5. Gametogenesis

Show answer
Correct Option: C
Explanation:

Parthenogenesis refers to the phenomenon of development of a fully formed individual directly from an unfertilised ovum.

Which of these acts as a start codon for the protein synthesis?

  1. AUG

  2. UAG

  3. UGA

  4. GUA

  5. AAG

Show answer
Correct Option: A
Explanation:

The codon AUG functions as a start codon and serves as a starting point for protein synthesis. It also codes for the amino acid methionine.

Which of the following is not a greenhouse gas?

  1. Carbon dioxide

  2. Methane

  3. Water vapour

  4. Oxygen

  5. Nitrous oxide

Show answer
Correct Option: D
Explanation:

Oxygen is not a greenhouse gas. It is absolutely essential for useful processes like respiration and combustion.

What do we call the process of synthesis of double stranded DNA from single stranded RNA?

  1. Transcription

  2. Reverse Transcription

  3. Translation

  4. Translocation

  5. Transformation

Show answer
Correct Option: B
Explanation:

Reverse Transcription is the process of synthesis of double stranded DNA from single stranded RNA using the enzyme reverse transcriptase.

Which international convention was held with the objective of conservation of biological diversity?

  1. Montreal Protocol

  2. Kyoto Protocol

  3. Earth Summit

  4. World Summit

  5. Beijing Protocol

Show answer
Correct Option: C
Explanation:

The Earth Summit was held in 1992 at Rio de Janeiro, Brazil. Its main objective was conservation of biological diversity.

What is Allen’s rule?

  1. Birds of colder regions tend to have narrower wings than those of warmer regions.

  2. Fish found in cold waters tend to have more vertebrae than those found in warm waters.

  3. Mammals, birds and insects found in tropical regions are darker in colour than those found in arctic regions.

  4. Mammals and birds of colder regions are larger in size than those of warmer regions.

  5. Mammals living in cold regions tend to have shorter ears and limbs than those found in warm areas.

Show answer
Correct Option: E
Explanation:

Mammals living in cold regions tend to have shorter ears and limbs than those found in warm areas. This is known as Allen’s rule.

What is the study of pollen grains called?

  1. Anthology

  2. Pomology

  3. Palynology

  4. Paleontology

  5. Pedology

Show answer
Correct Option: C
Explanation:

Palynology is the study of pollen grains.

Which microbe is used to produce statins that are being used as blood cholesterol lowering agents?

  1. Monascus purpureus

  2. Trichoderma polysporum

  3. Byssochalmys fulva

  4. Streptococcus

  5. Saccharomyces fragalis

Show answer
Correct Option: A
Explanation:

Monascus purpureus is used to produce statins, which are now being commercialised as blood cholesterol lowering agents.

What is spermiation?

  1. Transformation of spermatids into spermatozoa

  2. Formation of ova in the Graafian follicles of ovary

  3. Differentiation of cells at specific locations of the germ layers of gastrula to form the organ rudiments

  4. Release of sperms from seminiferous tubules

  5. Release of ova from Graafian follicle

Show answer
Correct Option: D
Explanation:

Release of sperms from the seminiferous tubules is called spermiation. 

Which trophic level is occupied by herbivores in a typical forest food chain?

  1. Primary producers

  2. Primary consumers

  3. Secondary consumers

  4. Tertiary consumers

  5. First trophic level

Show answer
Correct Option: B
Explanation:

Primary consumers are the herbivores, which feed on the producers.

- Hide questions
ADVERTISEMENT

Find more quizzes from top tags

general knowledge
3615 Quizzes
119858 Questions
 technology
307 Quizzes
36705 Questions
 sports
963 Quizzes
19148 Questions
 history
1187 Quizzes
13475 Questions
 physics
598 Quizzes
13441 Questions
 biology
1160 Quizzes
12174 Questions
 science & technology
551 Quizzes
11015 Questions
 chemistry
490 Quizzes
9892 Questions
 maths
518 Quizzes
9324 Questions
 softskills
0 Quizzes
7131 Questions