IIT JEE Practice Question and Answer
8Q: Which of the following statements about aldosterone is NOT correct? 2704 05b5cc65ee4d2b4197774bdfd
5b5cc65ee4d2b4197774bdfd- 1Aldosterone increases sodium reabsorption by increasing the number of Na+-K+ ATPase pumps in the luminal membrane of the proximal tubule.true
- 2Aldosterone is stimulated by decreased plasma sodium levels and increased plasma potassium levels.false
- 3Aldosterone is produced in the adrenal cortex.false
- 4Aldosterone increases the number of passive sodium channels in the luminal membrane of the distal tubule and collecting duct, thus aiding sodium reabsorption.false
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Answer : 1. "Aldosterone increases sodium reabsorption by increasing the number of Na+-K+ ATPase pumps in the luminal membrane of the proximal tubule."
Explanation :
Answer: A) Aldosterone increases sodium reabsorption by increasing the number of Na+-K+ ATPase pumps in the luminal membrane of the proximal tubule. Explanation: Aldosterone, the main mineralocorticoid hormone, is a steroid hormone produced by the zona glomerulosa of the adrenal cortex in the adrenal gland. It is essential for sodium conservation in the kidney, salivary glands, sweat glands and colon.
Q: Which of these is a human disease caused by bacteria? 2702 05b5cc6a1e4d2b4197774caa4
5b5cc6a1e4d2b4197774caa4- 1TBtrue
- 2Ascariasisfalse
- 3Chickenpoxfalse
- 4Common coldfalse
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Answer : 1. "TB"
Explanation :
Answer: A) TB Explanation: Bacteria which causes disease are called Pathogenic Bacteria. TB is caused by bacteria. Some of the diseases caused by bacteria are:: 1. Tuberculosis, TB (affects the lungs) 2. Salmonella (causes food poisoning) 3. Whooping cough (affects the lungs) 4. Septic Sore Throat
Q: System Study involves 2701 05b5cc69be4d2b4197774c7d9
5b5cc69be4d2b4197774c7d9- 1documenting the existing systemfalse
- 2identifying current deficiencies and establishing new goalsfalse
- 3study of an existing systemfalse
- 4All the abovetrue
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Answer : 4. "All the above"
Explanation :
Answer: D) All the above Explanation:
Q: A word that means the same thing as consumer is 2697 05b5cc6a9e4d2b4197774cedb
5b5cc6a9e4d2b4197774cedb- 1Autotrophfalse
- 2Producerfalse
- 3Heterotrophtrue
- 4Carbohydratefalse
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Answer : 3. "Heterotroph"
Explanation :
Answer: C) Heterotroph Explanation: Producer are Autotrophs as they prepare their own food and does'nt depend on others as Customers or Heterotrophs which depend on producers or Autotrophs.
Q: A user type a content on 20 sheets, each sheet consist of 55 lines, and each line can have 66 characters. The content is again retyped on another set of sheets, these new sheets have 65 lines and each line can take 70 characters. Calculate the reduction in sheets ? 2695 05b5cc6fee4d2b4197774f15c
5b5cc6fee4d2b4197774f15c- 12 or 60%false
- 24 or 20%true
- 36 or 10%false
- 48 or 5%false
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Answer : 2. "4 or 20%"
Explanation :
Answer: B) 4 or 20% Explanation: 20 x 55 x 66 = L x 65 x 70Here L = 72,600/4550 = 15.95 =~ 16Reduction is 20-16 = 4 which is 20% reduction.
Q: Mr. A, Miss B, Mr. C and Miss D are sitting around a table and discussing their trades. 1. Mr. A sits opposite to cook 2. Miss b sits right to the barber.3. The washer man is on the left of the tailor 4. Miss D sits opposite Mr. C What are the trades of A and B ? 2694 05b5cc741e4d2b4197774f9bd
5b5cc741e4d2b4197774f9bd- 1Tailor and Barberfalse
- 2Tailor and cooktrue
- 3Barber and cookfalse
- 4washer man and cookfalse
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Answer : 2. "Tailor and cook"
Explanation :
Answer: B) Tailor and cook Explanation: Clealry, C and D sit opposite to each other. So, if A sits opposite to cook, B shall be the cook.Now, B is to the right of barber. So, one of the rest, say C will be barber.Clealry, then D on the opposite side shall be washerman or tailor. But, washerman is left of tailor and D on the left of A.So, D is washerman and A is tailor. Thus, A and B are Tailor and Cook.
Q: Find the next number in the given number series? 96, 95, 87, 78, ? 2694 05b5cc60ae4d2b4197774b5c9
5b5cc60ae4d2b4197774b5c9- 164false
- 257false
- 329false
- 414true
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Answer : 4. "14"
Explanation :
Answer: D) 14 Explanation: The given number series is 96, 95, 87, 78, ? It follows a pattern that, 9696 - 12 = 9595 - 23 = 95 - 8 = 8787 - 32 = 87 - 9 = 7878 - 43 = 78 - 64 = 14 Hence, the next number in the given number series is 14.
Q: At what time will B catch up with A, if A starts from a place at 11.00 A.M. and travels at a speed of 3.5 kmph, B starts at 1.00 P.M. and travels with speeds of 1 kmph for 1 hour, 2 kmph for the next 1 hour, 3 kmph for the next 1 hour and so on. 2689 05b5cc715e4d2b4197774f409
5b5cc715e4d2b4197774f409- 18 : 47 pmfalse
- 26 : 40 pmfalse
- 38 : 42 pmfalse
- 47 : 40 pmtrue
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Answer : 4. "7 : 40 pm"
Explanation :
Answer: D) 7 : 40 pm Explanation: At 1 pm ... Distance between A and B = 2x3.5 = 7 kmsat 2 pm .....Distance between A and B = 7 + 3.5 - 1 = 9.5 kmsAt 3 pm ....Distance between A and B = 9.5 + 3.5 - 2 = 11 kms.......At 7 pm distance between A and B = 3 kms.From 7 pm to 8 pm, speed of A = 3.5 kmphspeed of B = 8 kmphRelative speed = 4.5 kmph Time taken by B to meet A = 3/4.5 hrs = 30/45 hrs = 120/3 mins = 40 mins. So meeting time is 7 : 40 PM.