RRB Group D 2021 Exam Important GS Biology Topics/Questions with Answers: RRB Group D 2021 Computer Based Exam (CBT) will be conducted from April 2021 to June 2021 tentatively as per the official notification for total 103769 Vacancies. To score high marks in the exam candidates must start practicing the important topics and questions for RRB Group D 2021 Exam. For the ease of the candidates, we have compiled Important Biology Topics & Questions from the General Science (GS) Section based on the latest exam pattern of the RRB Group D 2021 Exam.
RRB Group D 2021 General Science - Important Biology Topics & Questions
General Science is considered to be one of the highest-scoring sections of the RRB Group D 2021 Exam and will be of 25 marks. Let’s look at the important General Science - Biology topics that have appeared frequently in RRB GROUP D Exam over the last few years.
General Science (GS)
Important Inventions and their inventor
Important and Interesting facts about human body parts
Nutrition in Animals and Plants
Diseases and their causes like Bacteria
Viruses and Protozoa
Last four chapter of NCERT of Class 12th for environment
RRB Group D 2021 General Science Biology Important Questions
1. Japanese Encephalitis is spread by:
- Contaminated water
- Dog Bite
Explanation: JE virus is transmitted to humans through the bite of infected Culex species mosquitoes, particularly Culex tritaeniorhynchus.
2. The Characteristic feature of Virus is:
- It multiplies only on dead animals
- It multiplies only on hosts
- It lacks chlorophyll
- It is made up of fats
Explanation: The cell they multiply in is called the host cell.
3. Which of the following was the first antibiotic discovered by Alexander Fleming in 1928?
Explanation: In 1928 Alexander Fleming (1881–1955) discovered penicillin, made from the Penicillium notatum mold, but he did not receive the Nobel Prize in Physiology or Medicine for his discovery until 1945.
4. How many bones does a new born human baby have?
Explanation: Babies are born with 300–350 bones.
5. The bacterial conversion of Nitrogen into Nitrogen Compounds is called:
- Nitrogen Fixation
- None of the above
Explanation: The bacterial conversion of Nitrogen into Nitrogen Compounds is called Nitrogenation.
6. An Ant can see the objects all around it due to the presence of
- Simple eyes
- Eyes over its head
- Well developed eyes
- Compound eyes
Explanation: Ants have compound eyes with many units, called ommatidia. Their eyes look like an array of LEDs you'd see in a traffic light (except in a dome shape). Each ommatidium sees one point in space so the whole eye sees one image but different portions of it.
7. What is most common treatment for bacterial infections in humans?
Explanation: Most bacterial diseases can be treated with antibiotics, although antibiotic-resistant strains are starting to emerge.
8. What plant has the scientific name Solanum Tuberosum?
Explanation: The potato is a root vegetable native to the Americas, a starchy tuber of the plant Solanum tuberosum, and the plant itself is a perennial in the nightshade family, Solanaceae.
9. A sudden fall in the Barometric reading indicates:
- Hot weather
- Extreme Cold
Explanation: Sudden fall in barometer reading indicate stormy weather.
10. Which one of the following is an enzyme?
Explanation: Trypsin is an enzyme that helps us digest protein.
11. Who is called India’s Child Surgeon?
- Akrit Pran Jaswal
- Tathagat Avtar Tulsi
- Nischal Narayanam
- Sudhma Verma
Explanation: The name of that child is Akrit Jaswal, an Indian child surgeon who performed his first surgery at the age of seven. Akrit Pran Jaswal was born on April 23, 1993, at Nurpur, Himachal Pradesh.
12. Human respiration releases:
- Mixture of gases
- Carbon monoxide
- Carbon dioxide
Explanation: During cellular respiration, glucose and oxygen are changed into energy and carbon dioxide. Therefore, carbon dioxide is released into the atmosphere during the process of cellular respiration.
13. Among the following which is the only snake that builds a nest?
- King Cobra
Explanation: King Cobra is the only snake in the world that builds a nest.
14. Which of the following disease Is caused by the bite of a mad dog?
- None of the above
Explanation: Hydrophobia is the commonest name and relates to the major symptom.
15. Usually, colour blindness is:
- A genetic disposition.
- A non-genetic condition.
- A lifestyle disease.
- Caused by exposure to light.
Explanation: Colour blindness is usually a genetic (hereditary) condition (you are born with it). Red/green and blue colour blindness is usually passed down from your parents.
16. Which organ is not a gland?
- Gall bladder
Explanation: The gallbladder is a small pouch that sits just under the liver. The gallbladder stores bile produced by the liver.
17. Anaemic condition is due to:
- Deficiency of platelets.
- Deficiency of RBC.
- Deficiency of WBC.
- Deficiency of oxidants.
Explanation: Anaemia is a condition in which the number of Red Blood Cells (RBC) or the Haemoglobin concentration within them is lower than normal.
18. The longest cell in the human body is:
- Skeletal cells
- Nerve cells
Explanation: In the human body, the nerve cell is the longest cell.
19. Group of cells having a common origin and performing similar functions are called:
- Organ systems
- None of the above
Explanation: A tissue is a group of cells with a common origin, structure and function.
20. The acid present in the stomach which helps in the digestion of food is:
- Nitric acid
- Sulphuric acid
- Hydrogen chloride
- None of the above
Explanation: The hydrochloric acid in the gastric juice breaks down the food and the digestive enzymes split up the proteins.
Practicing Important Topics & Questions of the RRB Group D Exam can help you in many ways in your exam preparation. Remember that there are no sectional time limits and no sectional cut-offs. Your job is to simply maximize your score however you can.