Competitive Exams: Botany MCQs (Practice-Test 86 of 104)

  1. The prosthetic group of dehydrogenises is known as

    1. Flavin

    2. Riboflavin

    3. Ferredoxin

    4. Niacin

  2. The number of moles of substrate converted per minute by one mole of enzyme is called

    1. Turnover number

    2. Substrate number

    3. Enzyme number

    4. Peptide number

  3. The bonds between the enzyme and substrate must be

    1. Weak and long-lived

    2. Weak and short-lived

    3. Strong and long-lived

    4. Strong and short-lived

  4. Match List I (A feature of the bacterium) with List II (Name of bacterium) and select the correct answer using the codes given below the lists:

    List-I List-II
    1. Aerobic bacteria

    2. Anaerobic bacteria

    3. Chemosynthetic bacteria

    4. Photosynthetic bacteria

    1. Clostridium

    2. Thiobacillus

    3. Azotobacter

    4. Rhodospirillum

    • A
    • B
    • C
    • D
      • 3
      • 1
      • 4
      • 2
      • 1
      • 3
      • 4
      • 2
      • 1
      • 3
      • 2
      • 4
      • 3
      • 1
      • 2
      • 4
  5. Nitrate reductive is classified as a

    1. Zinc protein

    2. Iron protein

    3. Molybdenum protein

    4. Copper protein

  6. The source of electron for glyoxalin acid reeducates which reduce glyoxylate back to glycol ate is

    1. NADPH + H

    2. FADH2

    3. FdH2

    4. H2O

  7. The substrate for photorespiration is

    1. C6-acid

    2. C4-acid

    3. C3-acid

    4. C2-acid

  8. Clay and humic acid particles hold tightly

    1. Nitrate ions

    2. Ammonium ions

    3. Nitrite ions

    4. Molecular nitrogen

  9. Glycol sis and TCA cycle operate in

    1. Photorespiration

    2. f3-oxidation

    3. a-oxidation

    4. Dark respiration

  10. Which of the following components are associated with nitrate reeducates activity?

    1. Reduced pyridine nucleotide

    2. Flavin adenine dinucleotide

    3. Molybdenum

    4. Boron

    Select the correct answer using the codes given below:

    1. 1, 2 and 3

    2. 1 and 2

    3. 2, 3 and 4

    4. 1, 3 and 4

  11. During the germination of coconut, the major stored food is digested by

    1. a-amylase

    2. Lipase

    3. Protease

    4. Try sin

  12. The very first step in the formation of acetyl CoA is the

    1. Formation of a complex between thiamine pyrophosphate and syndicate

    2. Release of the acetyl group from lipoid acid to CoA

    3. Dicarboxylation of pyruvate

    4. Transfer of electrons from reduced lipoid acid to NAD

  13. Match List I with List II and select the correct answer using the codes given below the lists:

    List-I List-II
    1. Z-scheme of photosynthesis

    2. One gene-one enzyme concept

    3. Charismatic concept

    4. Concept of catalytic RNA

    1. Beadle and Tatum

    2. Hill and Bend all

    3. Cech and Altman

    4. Jacob and Monad

    5. P. Mitchell

    • A
    • B
    • C
    • D
      • 2
      • 1
      • 5
      • 3
      • 1
      • 2
      • 5
      • 4
      • 2
      • 1
      • 4
      • 3
      • 2
      • 3
      • 4
      • 5
  14. The most abundant protein enzyme found in plants is

    1. RUBP carboxyl's

    2. PEP carboxyl's

    3. Catalase

    4. Peroxides

  15. During aerobic respiration, the substrate level phosphorylation takes place in

    1. Cytoplasm only

    2. Mitochondria only

    3. Cytoplasm and mitochondria

    4. Cytoplasm and Golgi complex