Multiple Choice Questions

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Fermentation products of yeast are

  • H2O + CO2

  • Methyl alcohol + CO2

  • Methyl alcohol + water

  • Ethyl alcohol + CO2


D.

Ethyl alcohol + CO2

The yeast causes anaerobic respiration (fermentation). In the fermentation the pyruvate is broken down to form ethyl alcohol (C2H5OH), CO2 and NAD+. The ethyl alcohol is excreted.


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RQ for fatty substance/ fat is

  • unity

  • less than one

  • more than one

  • zero


The synthetic hormone used as a weedicide is

  • Indole 3-acetic acid

  • gibberellic acid

  • 2, 4- D 

  • Indole butyric acid


Stages in proper sequence of prophase- I are

  • zygotene, leptotene, pachytene, diakinesis

  • leptotene, zygotene, pachytene, diplotene and diakinesis

  • eptotene, pachytene, zygotene, diakinesis and diplotene

  • diplotene, diakinesis, pachytene, zygotene and leptotene


A group of plants or animals with similar traits of any rank is

  • species

  • genus

  • order

  • taxon


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Acromegaly is due to hypersecretion of

  • thyroxin

  • prolactin

  • insulin

  • growth hormone


In synapsis two homologous chromosomes are connected at

  • centromeres

  • chromomeres

  • telomeres

  • none of these


Which is present in monocot flowers?

  • Sepals

  • Petals

  • Tepals

  • None of these


What is true about vein ?

  • All veins carry deoxygenated blood

  • All veins carry oxygenated blood

  • They carry blood from organs towards heart

  • They carry blood from heart towards organs


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Grafting is not possible in monocots because they

  • lack cambium

  • have scattered vascular bundles

  • have parallel venation

  • are herbaceous