Sign up now
to enroll in courses, follow best educators, interact with the community and track your progress.
Download
391-420: MCQs for General Science for Govt. Exams (UPSC and SSC)
7,235 plays

More
In this lesson, Dr. Roman Saini will discuss the MCQs related to various topics in General Science from Class 6 to Class 8 (Science) NCERT.

Roman Saini is teaching live on Unacademy Plus

Roman Saini
Part of a great founding team at Unacademy with Gaurav, Hemesh. Movies, Guitar, Books, Teaching.

U
Unacademy user
Amazing Sir... Thanks for such a beautiful Knowledgeable lesson
Amazing Sir... Thanks for such a beautiful Knowledgeable lesson
that statement of yours on question 400 "congratulations if you are still listening to me" made my day ????????????
Hi sir, Really sorry to ask you a irrelevant question here.. Just want to ask what all documents are required at the time joining in IAS (after completing everything). like: Matriculation or equivalent certificate in original to verify the Name and Date of Birth. Self-attested photo-copy of Matriculation or equivalent certificate in original to verify the Name and Date of Birth. Degree certificate in original to prove education qualification (If original degree certificates are not issued, carry provisional certificates and/or mark-sheets). Self-attested photo-copy of Degree certificate in original to prove education qualification (If original degree certificates are not issued, carry provisional certificates and/or mark-sheets). Self-attested photo-copy of Degree in original. Mark-sheets of Degree in original (UPSC staff may not always ask, but carry along with you.) 2 passport size photographs that are taken recently. Self-attest one of them. E-summon letter print-out. TELL ME IF ANYTHING APART FROM IT.. Like if we need residential proof as well? waiting for ur kind revert
Q412. how is respiration a process of getting energy from food? Shouldn't it be cellular respiration?
  1. Q391. Which of the following organs/glands secrete digestive juice? 1. Liver 2. Pancreas 3. Salivary glands 4. Small Intestine Stomach Wall Select the correct answer using the code given below: A. 1, 2 and 3 B. 1, 2 and 4 C. 3, 4 and 5 D. All of the above


  2. Solution: D The main digestive glands which secrete digestive juices are The salivary glands, The liver and The pancreas. The stomach wall and the wall of the small intestine also secrete digestive juices.


  3. Q392. Consider the following facts about Liver: 1. Liver is an essential part of digestive system. 2. Liver produces Red Blood cells in an adult person. 3. It is the largest gland in the body. 4. It is known as the chemical factory of the body. Select the correct answer using the code given below: A. 1, 2 and 3 only B. 1, 2 and 4 only C. 1, 3 and 4 only D. 2 and 3 only


  4. Solution: C statement 2 is wrong because Liver doesn't produces red blood cells in an adult person. All the red blood cell are produced in Bone Marrow. Although, In foetuses, when they are very small, the liver makes red blood cells. So, if you encounter a statement like "Liver produces Red Blood cells" be careful. It will be right.


  5. Q393. Consider the following statements about functions of Liver: 1. The liver takes fats and proteins and turns it into glucose. 2 The liver also makes many proteins, fats and cholesterol. 3. The liver stores vitamins and minerals. 4. The Liver makes bile juice. Select the correct answer using the code given below: A. 1, 2 and 3 only B. 1, 3 and 4 only C. 1 and 4 only D. All of the above


  6. Solution: D Self explanatory


  7. Q394. Consider the following statements about Bile juice: 1. It is a dark green or yellowish colour fluid produced and stored in Liver. 2. It helps in digestion of lipids and fats. 3. It helps in absorption of Vitamin A, D and C. Select the correct answer using the code given below A. 1 only B. 2 only C. 1 and 2 D. All of the above


  8. Solution: B Bile or gall is a dark green to yellowish brown fluid, produced by the liver of most vertebrates, that aids the digestion of lipids in the small intestine Oln humans, bile is produced continuously by the liver (liver bile), stored and concentrated in the gallbladder (gallbladder bile) Since bile increases the absorption of fats, it is an important part of the absorption of the fat- soluble substances,Isuch as the vitamins A, D, E, and K C is not a fat soluble vitamin. Hence statement 1 and 3 are wrong.


  9. Q395. Most of the Fat digestion occurs in? A. Liver B. Large intestine C. Small intestine D. Duodenum


  10. Solution: C Self explanatory


  11. Q396. With reference to Pancreas, consider the following statements: 1. It is a vital organ located just below the stomach. 2. It is always on the left side of human body. 3. It belongs to the digestive system. 4. It also belongs to the endocrine system. Select the correct answer using the code given below: A. All of the above B. 1 and 2 only C. 1, 3 and 4 only D. 2 and 3 only


  12. Solution: A Statement 1 and 2 are self explanatory. It is a part of digestive system because it breaks downs the nutrients . lt is also a part of endocrine system because it produces the hormones.


  13. Solution: A Self explanatory


  14. Q399. Consider the following statements: 1. Insulin is a hormone which decreases the amount of glucose or sugar in the blood. 2. Glucagon is a hormone which increases the amount of glucose in the blood. 3. Lipase is an enzyme which breaks down the proteins. 4. Amylase is an which breaks down fats. Select the correct answer using the code given below: A. 1 and 2 only B. 3 and 4 only C. 1 and 3 only D. 1, 2 and 4 only


  15. Solution: A Self explanatory


  16. Q401. Consider the following statements 1. Salivary glands secrets saliva, which contains amylase enzyme. 2. Saliva consists of mucus and serous. 3. Mucus protects the lining of the stomach Select the correct answer using the code given below A. B. C. D. All of the above 1 and 2 only 1 and 3 only 2 and 3 only


  17. Solution: A Self explanatory


  18. Q403. Which of the following are pancreatic juices? 1. Pepsinogen 2. Trypsinogen 3. Mucus 4. Lipase Select the correct answer using the code given below: A. 1 and 4 only B. 2 and 4 only C. 3 and 4 only D. 2, 3 and 4 only


  19. Q404. Which of the following are gastric juices? 1. HCI 2. Serous 3. Mucus 4. Potassium ions Select the correct answer using the code given below: A. 1, 2 and 3 only B. 1, 3 and 4 only C. 2, 3 and 4 only D. All of the above


  20. Q405. Which of the following are Salivary juices? 1. Mucus 2. Serous 3. Potassium ion 4. Bicarbonate ions Select the correct answer using the code given below: A. 1, 2 and 3 B. 1, 2 and 4 C. 2, 3 and 4 D. All of the above


  21. Solution: D Self explanatory Ph value of salivary juice is 6.0-7.0


  22. Q406. Arrange the following in right order of digestive process: 1. Ingestion 2. Starch breakdown 2 Starch breakdown 3. Assimilation 4. Absorption 5. Excretion Select the correct answer using the code given below: A. 1-2-3-4-5 B. 1-2-4-3-5 C. 1-3-4-2-5 D. 1-4-2-3-5


  23. Solution: B Self explanatory


  24. Q408. Select all the enzymes which take part in carbohydrate digestion: 1. Amylase 2. Sucrose 3. Lactase 4. Maltose 5. Lipase Select the correct answer using the code given below: A. 1, 2, 3 and 4 only 8. 2, 3, 4 and 5 only C. 1, 3,4 and 5 only D. All of the above


  25. Solution: B Duodenum is the part of small intestine.


  26. Q411. At high altitude, the RBCs in human blood? A. Will increase in size B. Will increase in numbers C. Will decrease in size D. Will decrease in numbers


  27. Solution: B The rate of RBCs produced by the bone marrow is directly proportionate to the amount of the minor hormone erythropoietin produced by the kidney and lungs. And the major factor to boost erythropoietin production is hypoxia(lack of oxygen) IIn high altitudes, the body is in a state of relative hypoxia, due to the thin air, and less oxygen availability. Thus erythropoietin is continuously secreted, and the amount of RBCs increase.


  28. 0414. Choose the correct alternative from the following: Assertion (A) : The cramps may occur when muscle cells respire anaerobically. Reason (R)During anaerobic respiration in human cells the partial breakdown of glucose produces lactic acid. Select the correct answer using the code given below: Both A and R are true and R is the correct explanation of A. Both A and R are true but R is NOT the correct explanation of A. A is true but R is false. A is false but R is true. Both A and R are false. A. B. C. D. E.


  29. Solution: A Self explanatory


  30. Q418. Consider the following statements Cockroaches breathe through spiracles. 2. Frog and Earthworm breathe through skin. 3. Frog's lungs are useless. 4. Fish breathe through gills. Select the correct answer using the code given below: A. 1, 2 and 3 only B. 1, 2 and 4 only C. 2, 3 and 4 only D. 1 and 4 only


  31. Solution: B The energy required for various chemical activities needed for life is released by mitochondria in the form of ATP (Adenosine triphopshate) molecules ATP is known as the energy currency of the cell.