Alpha-helix is found in which level of protein structure?
Secondary structure
Tertiary structure
Primary structure
Quaternary structure
The main function of bulliform cells in grasses is :
to make the leaf impermeable to fungal spores.
to transport water.
to perform photosynthesis.
to minimize water loss during water stress.
Identify the correct sequence of steps in each cycle of Polymerase Chain Reaction :
Extension → Annealing → Denaturation
Annealing → Denaturation → Extension
Denaturation → Extension → Annealing
Denaturation → Annealing → Extension
$$ \text { Match List I with List II : } $$
| List-I (Phase of cell cycle) |
List-II (Activity) |
||
|---|---|---|---|
| A. | $\mathrm{G}_1$ phase | I. | Actual cell division occurs |
| B. | S phase | II. | Cell is metabolically active and continuously grows but does not replicate its DNA |
| C. | $\mathrm{G}_2$ Phase | III. | Synthesis of DNA occurs and the amount of DNA per cell doubles |
| D. | M phase | IV. | Proteins are synthesized while cell growth continues |
Choose the correct answer from the options given below :
A-IV, B-I, C-II, D-III
A-I, B-II, C-III, D-IV
A-III, B-IV, C-I, D-II
A-II, B-III, C-IV, D-I
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