The browning of fruit involves enzymes. The time taken for slices of apple kept in different solutions to turn brown is shown in the table. The effect of pH and…

Scientists are using human stem cells to develop treatments for a wide variety of healthconditions.Two types of stem cell that are available for this work are: stem cells collected from…

The labels 1, 2 and 3 in the following diagram represent cellular processes. The shaded areas represent processes that can happen without the use of energy provided by cellular respiration.…

The diagram shows part of the nitrogen cycle. Which of the numbered arrows represent(s) denitrification? Answer: 5) A In Denitrification, nitrate ions are reduced to produce nitrogen gas (N2). This…

SCID is an inherited condition in humans. People with some types of SCID are unable to make a functional enzyme necessary for the production of healthy white blood cells. A…

The diagram shows some of the stages of how a length of DNA can be removed from one organism and introduced into another organism. Which row is correct? Answer: 4)…

Which row identifies what is occurring during anaerobic respiration in animal cells? Answer: 5) A The respiration is ANAEROBIC, meaning no oxygen is used.Carbon dioxide is only formed in aerobic…