In figure 13-1 between which nucleotides is the DNA cut?
(A) ADENINE AND THYMINE
(B) CYTOSINE AND GUANINE
(C) THYMINE AND CYTOSINE
(D) ADENINE AND GUANINE

How many variables are altered in a good experiment? a.1 b.0 c.2 d.3

Asolution of an enzyme and a substrate was placed in a water bath and the temperature of the reaction was raised gradually. the graph shown was plotted at the end of the experiment. what can be concluded from the graph? a) temperature has no effect on the activity of the enzyme. b) the effect of temperature on the enzyme is unpredictable. c) the enzyme shows increased activity up to a certain temperature. d) the activity of the enzyme is inversely proportional to the temperature.

As the pea seeds respire, the level of coloured liquid in the left hand part of the capillary tube rises. by referring to what is happening in the apparatus, explain why the level of liquid changes