IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: Why are yeast cells frequently used as hosts for cloning? 3519 0

  • 1
    they are eukaryotic cells
    सही
    गलत
  • 2
    they do not have plasmids
    सही
    गलत
  • 3
    only yeast cells allow the gene to be cloned
    सही
    गलत
  • 4
    they easily form colonies
    सही
    गलत
  • उत्तर देखेंउत्तर छिपाएं
  • Workspace

उत्तर : 1. "they are eukaryotic cells"
व्याख्या :

Answer: A) they are eukaryotic cells Explanation: If you were to produce a protein in bacterial cloning systems, you would not get the same post transcriptional and post translational modifications because the prokaryotic and eukaryotic systems work differently on the modifications. Thus human recombinant protein genes are usually cloned in yeast cells. Also since they have a short generation time, they can be easily culture.

प्र: Find the odd one out of the following number series? 9 5 6 14 56 488 3516 0

  • 1
    56
    सही
    गलत
  • 2
    6
    सही
    गलत
  • 3
    14
    सही
    गलत
  • 4
    5
    सही
    गलत
  • उत्तर देखेंउत्तर छिपाएं
  • Workspace

उत्तर : 1. "56"
व्याख्या :

Answer: A) 56 Explanation: The given number series follows a pattern that, 9 9 x 0.5 + 0.5 = 5 5 x 1 + 1 = 6 6 x 2 + 2 = 14 14 x 4 + 4 = 60 (not equals to 56) 60 x 8 + 8 = 488.   Hence, the odd one in the given number series is 56.

प्र: The value of a machine depreciates at the rate of 10% every year. It was purchased 3 years ago. If its present value is Rs. 8,748, its purchase price was ? 3510 0

  • 1
    Rs.14,000
    सही
    गलत
  • 2
    Rs.12,000
    सही
    गलत
  • 3
    Rs. 12,800
    सही
    गलत
  • 4
    Rs. 15,000
    सही
    गलत
  • उत्तर देखेंउत्तर छिपाएं
  • Workspace

उत्तर : 2. "Rs.12,000"
व्याख्या :

Answer: B) Rs.12,000 Explanation: We have P = 8748, R = -10 and n = 3Therefore, the purchase price of the machine= P1+R100n= 87481-101003= 8748 x (100/90) x (100/90) x (100/90)= 12,000.   Therefore, the purchase price of the machine was Rs. 12,000.

प्र: How is my father's brother's only sibling's mother related to my sister's only brother ? 3509 0

  • 1
    Neice
    सही
    गलत
  • 2
    Aunt
    सही
    गलत
  • 3
    Mother
    सही
    गलत
  • 4
    Grand-mother
    सही
    गलत
  • उत्तर देखेंउत्तर छिपाएं
  • Workspace

उत्तर : 4. "Grand-mother"
व्याख्या :

Answer: D) Grand-mother Explanation: My father's brother's only sibling is my father. My father's mother is my grandmother. My sister's only brother is myself. So she is my Grandmother.

प्र: A person sold two cows each for Rs.9900. If he gained 10% on one and lost 20% on the other, then which of the following is true ? 3504 0

  • 1
    He lost Rs. 200
    सही
    गलत
  • 2
    He gained Rs. 200
    सही
    गलत
  • 3
    Neither he gained nor lost
    सही
    गलत
  • 4
    None of the above
    सही
    गलत
  • उत्तर देखेंउत्तर छिपाएं
  • Workspace

उत्तर : 4. "None of the above"
व्याख्या :

Answer: D) None of the above Explanation: In first he got Rs. 990 But in second he lost Rs. 1980 So he lost Rs. 990.

प्र: Joel introduces Mary as the daughter of the only son of my father’s wife. How is Joel related to Mary ? 3502 0

  • 1
    Daughter
    सही
    गलत
  • 2
    Brother
    सही
    गलत
  • 3
    Son
    सही
    गलत
  • 4
    Father
    सही
    गलत
  • उत्तर देखेंउत्तर छिपाएं
  • Workspace

उत्तर : 4. "Father"
व्याख्या :

Answer: D) Father Explanation: Resolving from the last , In the view of joel,My father’s wife – motherOnly son of mother – himself i.e. joelDaughter of john– daughter. So Joel is Father of Mary.

प्र: Ayurveda Owes its Origin to 3496 0

  • 1
    Yajurveda
    सही
    गलत
  • 2
    Atharvaveda
    सही
    गलत
  • 3
    Rigveda
    सही
    गलत
  • 4
    Samaveda
    सही
    गलत
  • उत्तर देखेंउत्तर छिपाएं
  • Workspace

उत्तर : 2. "Atharvaveda"
व्याख्या :

Answer: B) Atharvaveda Explanation: Ayurveda Owes its Origin to Atharvaveda.   The early history of ayurveda asserts that around 1500 BC, ayurveda's fundamental and applied principles got organised and enunciated. In this historical construction, Ayurveda traces its origins to the Vedas, Atharvaveda in particular, and is connected to Hindu religion. Atharvaveda (one of the four most ancient books of Indian knowledge, wisdom and culture) contains 114 hymns or formulations for the treatment of diseases. Ayurveda originated in and developed from these hymns. In this sense, ayurveda is considered by some to have divine origin. Indian medicine has a long history, and is one of the oldest organised systems of medicine. Its earliest concepts are set out in the sacred writings called the Vedas, especially in the metrical passages of the Atharvaveda.

प्र: In a G - 20 meeting there were total 20 people representing their own country. All the representative sat around a circular table. Find the number of ways in which we can arrange them around a circular table so that there is exactly one person between two representatives namely Manmohan and Musharraf. 3492 0

  • 1
    2 x (17!)
    सही
    गलत
  • 2
    2 x (18!)
    सही
    गलत
  • 3
    (3!) x (18!)
    सही
    गलत
  • 4
    (17!)
    सही
    गलत
  • उत्तर देखेंउत्तर छिपाएं
  • Workspace

उत्तर : 2. "2 x (18!)"
व्याख्या :

Answer: B) 2 x (18!) Explanation: A person can be chosen out of 18 people in 18 ways to be seated between Musharraf and Manmohan. Now consider Musharraf, Manmohan, and the third person, sitting between them, as a single personality, we can arrange them in 17! ways but Musharraf and Manmohan can also be arranged in 2 ways.    Required number of permutations = 18 x (17!) x 2 = 2 x 18!

      त्रुटि की रिपोर्ट करें

    कृपया संदेश दर्ज करें
    त्रुटि रिपोर्ट सफलतापूर्वक जमा हुई

      त्रुटि की रिपोर्ट करें

    कृपया संदेश दर्ज करें
    त्रुटि रिपोर्ट सफलतापूर्वक जमा हुई

      त्रुटि की रिपोर्ट करें

    कृपया संदेश दर्ज करें
    त्रुटि रिपोर्ट सफलतापूर्वक जमा हुई

      त्रुटि की रिपोर्ट करें

    कृपया संदेश दर्ज करें
    त्रुटि रिपोर्ट सफलतापूर्वक जमा हुई

      त्रुटि की रिपोर्ट करें

    कृपया संदेश दर्ज करें
    त्रुटि रिपोर्ट सफलतापूर्वक जमा हुई

      त्रुटि की रिपोर्ट करें

    कृपया संदेश दर्ज करें
    त्रुटि रिपोर्ट सफलतापूर्वक जमा हुई

      त्रुटि की रिपोर्ट करें

    कृपया संदेश दर्ज करें
    त्रुटि रिपोर्ट सफलतापूर्वक जमा हुई

      त्रुटि की रिपोर्ट करें

    कृपया संदेश दर्ज करें
    त्रुटि रिपोर्ट सफलतापूर्वक जमा हुई