Biology Questions for RRB NTPC Exam

Question 1

The role of villi in the intestine is to

Solution:

 

Oops! Wrong answer!

The small intestine contains small finger-like projections of tissue called villi which increase the surface area of the intestine and contain specialized cells that transport substances into the bloodstream. Hence, option D is correct.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Pedagogy of Science

Question 2

Cattle quickly swallow grass and store it in their __________.

Solution:

 

Oops! Wrong answer!

Cattle quickly swallow grass and store it in their Rumen. It helps in microbial fermentation of grass which contains cellulose and then later on Cow chews the grass completely.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 3

How many chambers does a mammalian heart have?

Solution:

 

Oops! Wrong answer!

  • Mammals are any members of a clade of endothermic amniotes distinguished from reptiles and birds by the possession of hair, three middle ear bones, mammary glands, and a neocortex.
  • The mammalian brain regulates body temperature and the circulatory system, including the four-chambered heart.
Difficulty Level: Easy
Correct Attempts: 0%
Topic: Biology

Question 4

Functional unit of ‘Kidney’

Solution:

 

Oops! Wrong answer!

The nephron, the basic structural and functional unit of kidney, regulated the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.
Difficulty Level: Easy
Correct Attempts: 0%
Topic: Biology

Question 5

Liver is a RICH source of :

Solution:

 

Oops! Wrong answer!

The liver is a vital organ of vertebrates and some other animals. In the human it is located in the upper right quadrant of the abdomen, below the diaphragm. The liver has a wide range of functions, including detoxification of various metabolites, protein synthesis, and the production of biochemical necessary for digestion.
The liver is a gland and plays a major role in metabolism with numerous functions in the human body, including regulation of glycogen storage, decomposition of red blood cells etc.
Difficulty Level: Easy
Correct Attempts: 0%
Topic: Biology

Question 6

The only living tissue in plant xylem is

Solution:

 

Oops! Wrong answer!

  • Xylem is one of the two types of transport tissue in vascular plants, phloem being the other.
  • The basic function of xylem is to transport water from roots to shoots and leaves, but it also transports some nutrients.
  • The tracheids, the trachea and the xylem fibers are non-living components, while xylem parenchyma represents the only living component of the tissue.

पौधों के ऊतकों के बारे में अधिक जानने के लिए: यहां क्लिक करें 

Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 7

What is the nature of cell membrane?

Solution:

 

Oops! Wrong answer!

Cell membrane is a semi-permeable thin layer which protect the cell from its surroundings. It also controls the movement of substances in and out of the cells and organelles.
Hence, B is the correct answer.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 8

The histogen, from which epidermis is formed is

Solution:

 

Oops! Wrong answer!

There are three meristematic layers in plants which consist of three sets of initials known as histogen. Dermotogen is the outer most layers, the cells of which divide anticlinally and give rise to the epidermeis,. Periblem and plerom are the other two histogene.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 9

How many pigments are associated with photosynthesis in plants?

Solution:

 

Oops! Wrong answer!

Four pigments are associated with photosynthesis in plants.
pigments are associated with photosynthesis in plants namely chlorophyll a, chlorophyll b, carotene, and xanthophyll.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Plants

Question 10

Which pigment is responsible for red colour of tomatoes?

Solution:

 

Oops! Wrong answer!

The colour of tomato changes as it ripens, its colour starts to change from green to yellow and then eventually to red. This is due to the breakdown of chlorophyll, which in turn synthesises a red carotenoid (another pigment group), lycopene.
Difficulty Level: Easy
Correct Attempts: 0%
Topic: Biology

Question 11

Identify the hormones which is not related to Pituitary Gland?

Solution:

 

Correct Answer

● Except D all the hormones are related to Pituitary Gland. Calcitonin is produced by the parafollicular cells( commonly known as C-cells) of the thyroid gland.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 12

Bamboo is a type of _________.

Solution:

 

Correct Answer

    • Bamboo is a type of grass.

 

    • They are evergreen perennial flowering plants in the subfamily Bambusoideae of the grass family Poaceae.

 

    • Bamboo have a unique rhizome-dependent system.

 

Difficulty Level: Medium
Correct Attempts: 0%
Topic: Geography

Question 13

Anthrax is caused by which microorganism?

Solution:

 

Oops! Wrong answer!

Anthrax is caused by bacteria Bacillus anthracis.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: How things work

Question 14

Bird flu is caused by which among the following influenza virus?

Solution:

 

Oops! Wrong answer!

Bird flu (Avian Influenza) is a disease caused by an influenza virus-A, that primarily affects birds.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Diseases

Question 15

Which of the following diseases is caused by protozoa?

Solution:

 

Correct Answer

Malaria disease is caused by a protozoan parasite called Plasmodium, and its carrier is female anaphalese mosquito. The affected organ is the spleen, in which the size increases in size.

प्रोटोजोआ से होने वाले प्रमुख रोग: –

ट्रिक: पापा काम पे सोते हैं

  • पायरिया, कालाजार, मलेरिया, पेचिस, सोने की बीमारी
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology in Day to Day Use

Question 16

The correct sequence of the complex processes involved in the digestion of food is

Solution:

 

Oops! Wrong answer!

There are four stages of food processing:
Ingestion: taking in nutrients
Digestion:using physical and chemical means to break down complex organic molecules into smaller usable parts
Absorption: pulling in digested molecules into the cells of the digestive tract, then into the blood
Egestion: the removal of waste food materials from the body
Hence, option B is correct.
Difficulty Level: Hard
Correct Attempts: 0%
Topic: Food

Question 17

In dicots the pollen-grains possess:

Solution:

 

Oops! Wrong answer!

Germ pores refers to the pores present in the outer wall of the pollen grain which gives rise to the pollen tube which in turns carries the male gamete to the ovary. In monocotl germ pore is present while a dicot is distinguished by the presence of 3 germ pores in its outer wall of the pollen grain.
Difficulty Level: Easy
Correct Attempts: 0%
Topic: Biology

Question 18

Allatois of Embryo helps in

Solution:

 

Oops! Wrong answer!

It helps the embryo exchange gases and handle liquid waste. The allantois and yolk sac become the umbilical cord, providing a connection through which food reaches the fetus, and wastes are removed.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 19

The process of pollination is

Solution:

 

Oops! Wrong answer!

The process of pollination is the transfer of pollen grains from anther to stigma.
The process of pollination is the transfer of pollen grains from anther to stigma which can be facilitated by winds, insects or bats. Anther is knob like structure in the plants that stores/ contains pollens. In contrast, stigma is a part of the plant which receives pollens.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Plants

Question 20

The disease caused by deficiency of protein in children is

Solution:

 

Oops! Wrong answer!

Marasmus disease is often caused by the lack of both protein and calories in food. Physical growth in the affected children stops. It is primarily in children of one year.

Pellagra is a disease caused by a lack of the vitamin niacin (vitamin B3)

Rickets is defective mineralization or calcification of bones due to deficiency or impaired metabolism of vitamin D, phosphorus or calcium, potentially leading to fractures and deformity.

Beriberi is caused by thiamine (vitamin B1) deficiency. Symptoms include weight loss, emotional disturbances, impaired sensory perception, weakness and pain in the limbs, and periods of irregular heart rate. Edema (swelling of bodily tissues) is common. Traditioanlly occures in region where Polished rice is predominant staple crop.

Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology in Day to Day Use

Question 21

Nitrogen fixing bacteria found in the root nodules of leguminous plant is-

Solution:

 

Oops! Wrong answer!

Commercial legume seeds are often coated with these organisms. In soil the cells are rod-shaped (as when growing on MYEA medium), whereas in the nodule and when fixing nitrogen they are Y-shaped, known as ‘bacteroids’. The nitrogen fixed by bacteria in root nodules will fertilise the soil.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Plants

Question 22

What is the nature of human saliva?

Solution:

 

Correct Answer

    • The pH value of human saliva is slightly acidic, which varies between pH 5.75 and 7.05, and it increases with increasing flow rate up to pH 8. Besides flow rate, the pH also depends on the concentration of salivary proteins, bicarbonate and phosphate ions that have considerable buffering capacity

 

Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 23

The pale yellow colour of urine is due to the presence of which pigment?

Solution:

 

Oops! Wrong answer!

  • The pale yellow colour of urine is due to the presence of Urochrome.
  • Urochrome is sometimes also called as Urobilin.
  • It is a linear Tetrapyrrole compound that is a degradation product of the Cyclic Tetrapyrrole heme.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 24

Which microorganism causes hepatitis B?

Solution:

 

Oops! Wrong answer!

Hepatitis B is an infectious disease caused by the hepatitis B virus (HBV) which affects the liver. It can cause both acute and chronic infections. Many people have no symptoms during the initial infection. Some develop a rapid onset of sickness with vomiting, yellowish skin, feeling tired, dark urine and abdominal pain. Often these symptoms last a few weeks and rarely does the initial infection result in death. It may take 30 to 180 days for symptoms to begin. In those who get infected around the time of birth 90% develop chronic hepatitis B while less than 10% of those infected after the age of five do. Most of those with chronic disease have no symptoms; however, cirrhosis and liver cancer may eventually develop. These complications result in the death of 15 to 25% of those with chronic disease.
Difficulty Level: Easy
Correct Attempts: 0%
Topic: Biology

Question 25

Which of the following glands is an example of endocrine gland?

Solution:

 

Oops! Wrong answer!

Thyroid gland is an example of endocrine gland. It is situated below the larynx on both sides of the respiratory trachea in throat of human.
Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct. The major glands of the endocrine system include the pituitary gland, thyroid gland, parathyroid gland, and adrenal glands e.t.c.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 26

In which form is glucose stored in our body?

Solution:

 

Oops! Wrong answer!

Glycogen is a multibranched polysaccharide of glucose. It serves as a form of energy storage in humans, animals, fungi, and bacteria. The polysaccharide structure represents the main storage form of glucose in the body.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 27

_____ are a group of chemicals that influence cell division and shoot formation.

Solution:

 

Oops! Wrong answer!

Cytokinins are a group of chemicals that influence cell division and shoot formation. Cytokinins are plant hormone that are needed for plant growth and initiated cell division in plant shoot and root. Cytokinins increase cell division by stimulating the production of proteins needed for mitosis.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 28

Some roots, called _________, arise from an organ other than the radicle.

Solution:

 

Correct Answer

Roots that grow from any part of plant like stem or leaf other than the radicle or its branches are called adventitious roots. It helps in vegetative propagation and providing oxygen to plants. Example of adventitious roots are roots of rose, turmeric, sweet potato plants.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 29

The process of producing energy in plants is known as

Solution:

 

Oops! Wrong answer!

The process of producing energy in plants is known as Photosynthesis. Photosynthesis is a process used by plants to convert light energy into chemical energy. Chlorophyll pigment in the plants absorb sunlight which then along with carbon dioxide and water via chemical reaction forms glucose in form of adenosine triphosphate energy molecules.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 30

Natural system of classification was proposed by ____________ botanists

Solution:

 

Oops! Wrong answer!

Natural system of classification was proposed by British botanists. Essay on the Natural System of Classification of Plants as suggestes by Bentham and Joseph Dalton Hooker. Natural system of classification is that in which all natural characters of plants both vegetative and reproductive are taken in to consideration as the basic of classification principally the plants are grouped according to their related characters.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 31

Minamata disease is caused by pollution of water by :

Solution:

 

Oops! Wrong answer!

Minamata disease is caused by the release of methyl-mercury in the industrial wastewater from the Chisso Corporation’s chemical factory, which continued from 1932 to 1968. Minamata disease was first discovered in Minamata city in Kumamoto prefecture, Japan, in 1956.

Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 32

The fur of the animals living in colder regions

Solution:

 

Oops! Wrong answer!

Thick fur allows animals living in cold regions to keep the body warmth just like the blanket keep us warm. The air trapped between the fiber or fur will have the same temperature as the body and hence prevents the body temperature from escaping into the cold atmosphere. Those animals that do not have thick fur
(whales, seals, dolphins) have thick layer of fat underneath the skin which does the same insulating function as the fur.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 33

The Drone in honey-bee are

Solution:

 

Oops! Wrong answer!

Drones are fertile male honey bees. They develop from eggs that have not been fertilized. The drones’ main function is to be ready to fertilize a receptive queen.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 34

Which of the following causes Malaria?

Solution:

 

Oops! Wrong answer!

Malaria is caused by the protozoan parasite Plasmodium. Human malaria is caused by four different species of Plasmodium: P. falciparum, P. malariae, P. ovale and P. vivax. Humans occasionally become infected with Plasmodium species that normally infect animals, such as P. knowlesi.
Difficulty Level: Easy
Correct Attempts: 0%
Topic: Biology

Question 35

Allosomes are _____.

Solution:

 

Correct Answer

    • An allosome is also referred as a sex chromosome or heterotypical chromosome.

 

    • The 22 pair of chromosomes are similar in all human.

 

    • The chromosomes of the 23rd pair are called allosomes consisting of two X chromosomes in females, and an X chromosome and a Y chromosome in males.

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