Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

71.

Ribosomal RNA is actively synthesised in 

  • lysosomes

  • nucleolus

  • nucleoplasm

  • nucleoplasm

557 Views

72.

Identify the possible link A in the following food chain
Green plant rightwards arrowInsect rightwards arrow Frog rightwards arrow A rightwards arrow Eagle

  • rabbit

  • wolf

  • cobra

  • cobra

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73.

Given below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels?



  • Level PC is insects and level SC is small insectivorous birds

  • Level PP is phytoplanktons in sea and Whale on top level TC

  • Level on PP is pipal trees and the level SC is sheep

  • Level on PP is pipal trees and the level SC is sheep


A.

Level PC is insects and level SC is small insectivorous birds

The given figure shows spindle-shaped pyramid of number in single tree ecosystem. Here a single large sized tree provides food to a large number of herbivores which support a few carnivores and the later are eaten by small number of top carnivores. So, here PP is used for producer, ie., single tree, PC is Primary consumers, i.e., large number of insects, SC is secondary consumers, i.e., small insectivorous bird and TC is Top consumers which may be eagles or falcon, etc.

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74.

Monascus purpureus is a yeast used commercially in the production of 

  • ethanol

  • streptokinase for removing clots from the blood vessels

  • citric acid

  • citric acid

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75.

A normal-visioned man whose father was colour-blind, marries a woman whose father was also colour-blind. They have their first child as a daughter. What are the chances that this child would be colour-blind?

  • 100%

  • 0%

  • 25%

  • 25%

1550 Views

76.

Signals for parturition originate from

  • both placenta as well as fully developed foetus

  • oxytocin released from maternal pituitary

  • placenta only

  • placenta only

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77.

A patient brought to a hospital with myocardial infarction is normally immediately given

  • penicillin

  • streptokinase

  • cyclosporin - A

  • cyclosporin - A

438 Views

78.

Which one of the following is not a property of cancerous cells, whereas the remaining three are?

  • They compete with normal cells for vital nutrients. 

  • They do not remain confined in the area of formation

  • They divide in an uncontrolled manner

  • They divide in an uncontrolled manner

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79.

Which one of the following is not a functional unit of an ecosystem?

  • Energy flow

  • Decomposition

  • Productivity

  • Productivity

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80.

In a normal pregnant woman, the amount of total gonadotropin activity was assessed. The result expected was

  • High level of circulating FSH and LH in the uterus to stimulate implantation of the embryo

  • High level of circulating HCG to stimulate endometrial thickening

  • High levels of FSH and LH in uterus to stimulate endometrial thickening

  • High levels of FSH and LH in uterus to stimulate endometrial thickening

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