Carbohydrates, the most abundant biomolecules on earth, are produ

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 Multiple Choice QuestionsMultiple Choice Questions

211.

In DNA, which is absent

  • Adenine

  • Thymine

  • Guanine

  • Uracil


212.

Which is called soluble RNA

  • r-RNA

  • t-RNA

  • m-RNA

  • hn-RNA


213.

Micro-nutrients are

  • less important in nutrition than macronutrients

  • as important in nutrition as macro-nutrients

  • may be omitted from culture media without any detrimental effect on the plant

  • called micro because they play only minor role in nutrition


214.

Carrier of fluorosis is

  • CO2

  • chlorine

  • nitrogen

  • water


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215.

Non-genetic RNA is of

  • two types

  • three types

  • only one type

  • none of these


216.

A nucleotide is a molecule consisting of a

  •  hexose sugar, phosphorus and albumen

  • phosphorus, iron and calcium

  • phosphate, 5-carbon sugar and nitrogen base

  • RNA and glucose


217.

Non-protein part of enzyme is known as

  • holoenzyme

  • apoenzyme

  • prothetic group

  • none of these


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218.

Carbohydrates, the most abundant biomolecules on earth, are produced by:

  • all bacteria, fungi and algae

  • fungi, algae and green plant cells

  • some bacteria, algae and green plant cells

  • viruses, fungi and bacteria


C.

some bacteria, algae and green plant cells

Some photosynthetic bacteria such as Rhodopseudomonas can prepare carbohydrates.
But during this type of food synthesis O2 is not evolved because in this case hydrogen donor is other than H2O.  

Algae (green and blue green) and all green plant cells prepare their food (carbohydrate) through photosynthesis. Here, hydrogen ions are donated by water molecules by the process of photolysis of water i.e., O2 is released during this type of food synthesis.


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219.

Which one is antioxidant vitamin?

  • Vitamin- D

  • Vitamin- E

  • Vitamin- B

  • Vitamin- K


220.

A nucleoside is

  • base + sugar

  • base + phosphate

  • sugar+ phosphate

  • base + sugar+ phosphate


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