Which is the first CO₂ acceptor enzyme in C₄ plants:
1. RuDP Carboxylase
2. Phosphoric acid
3. RUBISCO
4. PEP-Carboxylase

Which pair is wrong:
1.  $C_3$ – Maize
2.  $C_4$ – Kranz anatomy
3.  Calvin cycle - PGA
4.  Hatch and Slack cycle – O.A.A

In the sugarcane plant, ¹⁴CO₂ is fixed in malic acid because the enzyme that fixes CO₂ is:

1. Ribulose biphosphate carboxylase

2. Phosphoenol pyruvic acid carboxylase

3. Ribulose phosphate kinase

4. Fructose phosphatase

As compared to a $C_3$-plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by $C_4$-plants:

Photosynthesis in C₄ plants is relatively less limited by atmospheric $C{O}_2$ levels because: