Life Sciences

biochemistry Life Sciences

15 Questions Published

Questions

Question 1 Multiple Choice (Single Answer)

The thylakoids are removed and kept in a culture medium containing carbon dioxide and water. If the set up is exposed to light, hexose sugars are not formed.
An appropriate reason for this can be

  1. the light trapping device is not functional
  2. enzymes needed are not available
  3. no integrated functioning of the two photosystems
  4. carbon assimilation cannot take place in light
  5. none of the above
Question 2 Multiple Choice (Single Answer)

Stanley Miller in his laboratory apparartus synthesised

  1. amino acids
  2. protobionts
  3. proteinoids
  4. protocells
  5. none of the above
Question 3 Multiple Choice (Single Answer)

The tendrillar movement is an example of

  1. phototropism
  2. geotropism
  3. hydrotropism
  4. chemotropism
  5. thigmotropism
Question 4 Multiple Choice (Single Answer)

Application of gibbrelic acid induces flowering in

  1. long day plants
  2. short day plants
  3. both 1 and 2
  4. neither 1 nor 2
  5. day neutral plants
Question 5 Multiple Choice (Single Answer)

During cyclic photophosphorylation

  1. light of wavelengths more than 680 nm is utilised
  2. no photolysis of water occurs
  3. shortage of oxidised NADPH is present
  4. neither O2 nor NADPH is produced
  5. all of the above
Question 6 Multiple Choice (Single Answer)

The strophiole is usually present in the seed of members of

  1. fabaceae
  2. asteraceae
  3. malvaceae
  4. solanaceae
  5. leguminoseae
Question 7 Multiple Choice (Single Answer)

Seeds of Carum copticum are used as an antispasmodic as they contain

  1. thymol
  2. atropine
  3. caffeine
  4. nicotine
  5. aconite
Question 8 Multiple Choice (Single Answer)

Loss of geotropic response is a marked deficiency of

  1. molybdenum
  2. calcium
  3. zinc
  4. copper
  5. boron
Question 9 Multiple Choice (Single Answer)

Nuclear fusion has been obtained between Arabidopsis + Brassica. The + mark indicates that the resultant is

  1. cybrid
  2. hybrid
  3. graft
  4. somaclone
  5. neotype
Question 10 Multiple Choice (Single Answer)

The term cereal applies to

  1. rice, wheat, maize, barley, oat, rye
  2. rice, sorghum, wheat, bajra and quinoa
  3. wheat, sugarcane, ragi and bajra
  4. rice, wheat, bajra, maize and buckwheat
  5. maize, rice, sorghum, millets and chick pea
Question 11 Multiple Choice (Single Answer)

Formation of microspheres, liposomes and coacervates all require

  1. RNA
  2. Proteins
  3. Phospholipids
  4. Lipids
  5. Self assembly
Question 12 Multiple Choice (Single Answer)

Which of the following is not a component of an operon of a prokaryote?

  1. Operator
  2. Terminator
  3. CAP
  4. TATA box
  5. Regulator
Question 13 Multiple Choice (Single Answer)

The final electron acceptor during the light reaction of photosynthesis is

  1. NADP
  2. Ferredoxin
  3. Plastoqinone
  4. Cytochromes
  5. Plastocyanin
Question 14 Multiple Choice (Single Answer)

Tea yellows is caused by the deficiency of

  1. potassium
  2. magnesium
  3. copper
  4. sulphur
  5. manganese
Question 15 Multiple Choice (Single Answer)

Which one of the following is not a characteristic of tundra?

  1. Vast coniferous forests
  2. Permafrost
  3. Windy area
  4. Wildfire
  5. Very less human activity