Biology MCQ for RRB JE

Biology MCQ for RRB JE

Aspirants preparing for the exam can refer to the following Biology MCQ for RRB JE CBT 1 to get an idea of the difficulty level of the questions that are asked. These biology questions will definitely help your preparation.

1.Common name for free living aquatic and terrestrial micro-organisms which can fix atmospheric nitrogen.

A. Bacillus polymuxa
B. Pseudomonas fluorescence
C. Cyanobacteria
D. Xanthomonas campestris

Answer ||| C

Solution |||

• It is a predominantly photosynthetic bacterium containing a blue pigment in addition to chlorophyll.
• Earlier they were commonly termed as blue-green algae.
• The nitrogen-fixing activity of these organisms is strongly dependent on a adequate sunlight and soil organic matter.

2.Which of the following enzyme is beneficial in treating clots in the blood vessels ?

A. Lipase
B. Protease
C. Streptokinase
D. Amylase

Answer ||| C

Solution |||

• Streptokinase is obtained from the bacterium Streptococcus and is used as a clot buster for the removal of clots from blood vessels.
• Lipasebreaks down dietary fats into smaller molecules called fatty acids and glycerol.
• Commercially, Lipase is used in detergent formulations for the removal of oily strains.
• Amylase degrades starch.
• Proteases are involved in the breakdown of proteins.

3.How many documented varieties of basmati are grown in India?

A. 34
B. 35
C. 27
D. 28

Answer ||| C

Solution |||

• 27 documented varieties of basmati rice are grown in India.
• Basmati is unique for its aroma and flavor.
• In 1997 an American company got patents rights on basmati.

4.Which statement about genetically modified (GM) food is false?

A. Scientists have used genetic modification, in various forms, as a mean of improving crop yields, crop quality, and pest resistance for many years.
B. Genetic modification includes products made by artificial mutagenesis and by non-natural crosses between unrelated species.
C. A major difficulty in labelling foods as ‘GM-free’ is that it is virtually impossible to measure genetically modified DNA or protein molecules in most food made from GM crops.
D. The recent decision by McCain Foods to stop processing GM potatoes means that they will eventually use less pesticides to produce the potatoes that are required to make fries.

Answer ||| D

Solution ||| GM food or genetically modified food is obtained from crops improved by artificial mutagenesis and non-natural crosses between unrelated species. GM food production does not involve use of pesticides etc., but includes incorporation of pest resistance genes either through mutation or through transferring it from an insect resistant species.

5.A network of membranes that permeate throughout the cytoplasm of eukaryotic cell are known as

A. endoplasmic reticulum
B. tubulin protein trabeculae
C. cytosol
D. none of the above

Answer ||| A

Solution ||| Endoplasmic reticulum is the network of membranes that permeate throughout the cytoplasm of a eukaryotic cell. It transports material throughout the cell and is found both in plant and animal eukaryotic cell.

6.Which of the following organelles are rich in hydrolases?

A. Plastids
B. Lysosomal vesicles
C. Golgi apparatus
D. Nucleolus

Answer ||| B

Solution ||| Lysosomes are membrane bound vesicular structures that are rich in hydrolases i.e., digestive enzymes like proteases, carbohydrases and lipases. The enzymes are active at a certain pH and have the ability to digest proteins, carbohydrates, lipids and nucleic acid.

7.Fungi causing brown rust disease on wheat plant is

A. Albugo
B. Penicillium
C. Alternaria
D. Puccinia

Answer ||| D

Solution ||| Puccinia is called rust fungi, causing brown rust disease on wheat plant

8.The term biodiversity is popularised by

A. Ramdeo Misra
B. Carolus Linnaeus
C. Edward Wilson
D. Ernst Mayr

Answer ||| C

Solution ||| Biodiversity is the term popularised by the sociobiologist Edward Wilson to describe the combined diversity at all the levels of biological organisation.

9.Loss of biodiversity in a region may lead to

A. Decline in plant production
B. Increased variability in ecosystem processes
C. Lesser resistance to environmental distributions
D. All the above

Answer ||| D

Solution |||

In general, loss of biodiversity in a region may lead to (a) decline in plant production, (b) lowered resistance to environmental perturbations such as drought and (c) increased variability in certain ecosystem processes such as plant productivity, water use, and pest and disease cycles.

10.Which of the following options represents viviparous animals?

A. Spiny ant eater
B. Platypus
C. Dolphin
D. Both A and B

Answer ||| C

Solution |||

• Spiny anteater and platypus are oviparous animals.
• These two are the exception among mammals.
• All mammals are viviparous except these two.
• Dolphin is a mammal and give birth to young ones.

Importance of Biology in RRB JE

General Science as a subject in RRB JE is of extreme importance. In that as well, biology is very crucial as candidates can expect 10-12 questions from it in the exam out of 30 that the whole subject has. Biology for RRB JE thus becomes a subject that candidates must study as it can be very scoring. Candidates can score full marks in this section if they practice RRB JE previous year papers and MCQs provided here well.

Biology Syllabus for RRB JE

The following are the topics that are needed to be covered in Biology for RRB JE.

• Plant Kingdom
• Animal Kingdom
• Molecular Basis of Inheritance
• Genetics and Evolution
• Ecology and Environment
• Reproduction

Related Links:

• Medical Criteria for RRB JE
• Periodic Table for RRB JE
• Important Science Questions for RRB JE