Given below is a schematic break-up of the phases/stages of cell cycle. Which one of the following is the correct indication of the stage/ phase in the cell cycle?
C-karyokinesis
S-synthetic phase
A-cytokinesis
B-metaphase
B.
S-synthetic phase
In cell cycle, there are two main phases-interphase and mitotic phase. Interphase is divided into three stage G1, S and G2, G1 is the first growth phase. S is a synthetic phase and G2 is second growth phase.
Which of the following characteristics is are exhibited by C4 -plants?
I. Kranz anatomy.
II. The first product of photosynthesis is oxaloacetic acid.
III. Both PEP carboxylates and ribulose biphosphate carboxylate act as carboxylating enzymes.
The correct option is
I and III, but not ll
I and II, but not III
II and III, but not I
ll and III
Which of the following properties is shown by cytokinins?
Delay leaf senescence
Cause leaf abscission
Promote seed dormancy
Promote stornatal closing
Which of the following plant keeps its stomata open during night and closed during the day?
Orchid
Cactus
Tea
Wheat
In photosynthesis carbon dioxide is converted to carbohydrates. It is a process.
Reductive
Oxidative
Catabolic and exergonic
None of the above
Which one out of (a) to (d) given below correctly represents the structural formula of the basic amino acid?
Which one of the following structural formula of two organic compounds is correctly identified along with its related function?
B-uracil – a component of DNA
A-triglyceride – major source of energy
A-lecithin – a component of cell membrane
B-adenine – a nucleotide that makes up nucleic
