Which of the following microbes produces nitrogen-fixing nodules in non-leguminous plants?
Rhizobium
Frankia
Azotobacter
Pseudomonas
Pseudomonas
Splitting of water molecues during the light reaction of photosynthesis is associated with
(a) PSI resulting in the release of O2, Protons and transfer of electrons of PS II.
(b) PSII resulting in the release of O2, Protons and transfer of electrons of PS I.
(c) PSII resulting in the release of O2, Protons and transfer of electrons of PS II.
(d) PSI resulting in the release of O2, Protons and transfer of electrons of PS I.
(a) alone is correct
(b) alone is correct
(c) alone is correct
(d) alone is correct
(d) alone is correct
C.
(c) alone is correct
When the electrons leave the chlorophyll molecules of PS II, it leaves a hole behind it. This electron hole is filled in by a water molecule that is oxidized, or loses electrons, as it essentially splits into two hydrogen atoms or protons and an oxygen atom.
N2 + 8e + 8H+ + 16ATP 2NH3 + H2 + 16ADP + 16 Pi
The above equation refers to
Nitrification
Reductive amination
Denitriofication
Transamination
Transamination
Match Column I with Column II and choose the right option
Column I | Column II |
A. Acetyl CoA | 1. 3-carbon compound |
B. Malic acid | 2. 6-carbon compound |
C. Pyruvic acid | 3. 4-carbon compound |
D. Glucose | 4. 2-carbon compound |
A - 2; B - 4; C - 3; D - 1
A - 2; B - 3; C - 4; D - 1
A - 4; B - 1; C - 2; D - 3
A - 4; B - 3; C - 1; D - 2
A - 4; B - 3; C - 1; D - 2
Kranz anatomy is not seen in
(i) Maize
(ii) Sorghum
(iii) Tomato
(i) and (ii) only
(i) and (iii) only
(i) only
(ii) only
(ii) only
In photorespiration, the number of ATP and NADPH synthesised are respectively
1 and 3
2 and 3
3 and 4
0 and 0
0 and 0
The respiratory quotient value of 0.7 is obtained for
Anaerobic respiration
Glucose
Proteins
Organic acids
Organic acids
In which one of the following steps of citric and cycle FAD+
is reduced to FADH2?
Pyruvate Acetyl coenzyme A
Succinic acid Malic acid
Malic acid Oxaloacetic acid
Citric acid – Ketoglutaric acid
Citric acid – Ketoglutaric acid
Horizontal growth of seedlings, swelling of the axis and apical hook formation in dicot seedlings is brought about by
Auxins
Gibberellins
Ethylene
Kinetin
Kinetin
The cell derived from meristems differentiate and regain the capacity to divide by a phenomenon called
Differentiation
Dedifferentiation
Redifferentiation
Totipotency
Totipotency