Quaternary structure is seen in proteins that:
1. act as biochemical catalysts
2. are embedded within the plasma membrane
3. are assembly of more than one subunits
4. do not have any structural role in the cell

The double helix model of DNA by Watson and Crick exhibits its:

The strands of the DNA double helix are:

At each step of ascent, the helical strand of DNA turns

Almost all enzymes are:

In the absence of carbonic anhydrase in the human body, the reaction between carbon dioxide and water leading to the formation of carbonic acid:

Which of these can have catalytic activity?

Enzymes speed up the chemical reactions by:
1. Getting used up in the reaction
2. Formation of different products
3. Converting endothermic reactions to exothermic
4. Lowering activation energy

The substrate concentration at which the enzyme catalyzed reaction achieves ½ Vmax is its ____ value.

In general, with every 10^oC rise in the temperature [in the range 0^oC to 40^oC], the rate of enzyme catalyzed reaction:
1. Becomes half
2. Gets doubled
3. Remains same
4. There is no such correlation in general