Biology : Biomolecules

The genetic defect-Adenosine Deaminase (ADA) deficiency may be cured permanently by

• periodic infusion of genetically engineered lymphocytes having functional ADA cDNA

• administering denosine deaminase activators

• introducing bone marrow cells producing ADA into cells at early embryonic stages

• introducing bone marrow cells producing ADA into cells at early embryonic stages

Carbohydrates are commonly found as starch in plant storage organs. which of the following five properties of starch (A-E) make it useful as a storage material?

A) Easily translocated

B) Chemically non-reactive

C) Easily digested by animals

D) Osmotically inactive

E) Synthesized during photosynthesis

The useful properties are 

• (B) and (C)

• (B) and (D)

• (A), (C) adn (E)

• (A), (C) adn (E)

One gene-one enzyme relationship was established for the first time in

• Neurospora crassa

• Salmonella typhimurium

• Escherichia coli

• Escherichia coli

All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is

• lactate dehydrogenase

• isocitrate dehydrogenase

• malate dehydrogenase

• malate dehydrogenase

An organic substance bound to an enzyme and essential for its activity is called

• coenzyme

• holoenzyme

• apoenzyme

• apoenzyme

What is the role of NAD⁺ in cellular respiration?

• It functions as an enzyme.

• It functions as an electron carrier.

• It is the final electron acceptor for anaerobic respiration.

• It is a nucleotide source for ATP synthesis.

Fixation of one CO2 molecule through the Calvin cycle requires.

• 1 ATP and 2NADPH₂

• 2 ATP and 2NADPH₂

• 3 ATP and 2NADH₂

• 2 ATP and 1 NADPH₂

Match the storage products listed under column I with the organism given under column II, choose the appropriate option from the given options

Column I		Column II
A	Glycogen	1	Sargassum
B	Pyrenoids	2	Nostoc
C	Laminarin and mannitol	3	Polysiphonia
D	Floridean starch	4	Spirogyra
		5	Agaricus

• A	B	C	D
  3	4	1	5

• A	B	C	D
  4	3	5	2

• A	B	C	D
  5	4	1	3

• A	B	C	D
  2	1	4	3

In which of the following haemocyanin pigment is found?

•  Lower invertebrates

• Echinodermata

• Insecta

• Annelida

Which one out of (a) to (d) given below correctly represents the structural formula of the basic amino acid?