If the momentum of electron is changed by P, then the de-Broglie wavelength associated with it changes by 0.5%. The initial momentum of electron will be:
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(a) 200 P (b) 400 P […]
The transition from the state 3n = 3 to n = 1 in a hydrogen like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition from:
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(a) 2 […]
The instantaneous values of alternating current and voltages in a circuit are given as i = 1/√2 sin (100πt) amper e = 1/√2 sin (100πt + π/3) Volt The average power in Watts consumed in […]
A car of mass m starts from rest and accelerates so that the instantaneous power delivered to the car has a constant magnitude P₀. The instantaneouos velocity of of this car is proportional to:
Which one of the following cellular parts is correctly described?
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(a) Centrioles – Sites for active RNA synthesis (b) Lysosomes – Optimally active at a pH of about 8.5 (c) Thylakoids – Flattened […]
Which one of the following statements is wrong?
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(a) When pollen is shed at two-celled stage, doubled fertiliztion does not take place (b) Vegetative cell is larger thean generative cell (c) Pollen […]
Read the following four statements (A-D). (A) In transcription, adenosine pairs with uracil. (B) Regulation of lac operon by repressor is referred to as positive regulations. (C) The human genome has approximately 50,000 genes. (D) […]
Which of the following forms the basis of DNA Finger printing?
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(a) The relative proportions of purines and pyrimidines in DNA. (b) Satellite DNA occurring as highly rpeated short DNA segments (c) […]
Which one of the following pairs of chemical substances is correctly categorized?
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(a) Calcitonin and thymosin – Thyroid hormones (b) Pepsin and prolactin – Two digestive enzymes secreted in stomach (c) Troponin and […]
The secretory phase in the human menstrual cycle is also called
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(a) luteal phase and lasts for about 6 days (b) follicular phase lasting for about 6 days (c) luteal phase and […]
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