When carrying out the starch test on a leaf, why is it important to boil the leaf in alcohol?

Name the main organs of the human digestive system in the order they participate in the process of digestion. Describe how the digestion of carbohydrates and proteins takes place in our body.

Explain the process by which the energy requirements of autotrophic organisms are fulfilled. In which form are the unused carbohydrates stored?

Which of the following are the correct functions of the two components of pancreatic juice, $trypsin$ and $lipase$?

A plant is kept in the dark for two days to destarch its leaves. A leaf is then used in an experiment to investigate the effect of light and carbon dioxide on photosynthesis. Part $Q$ of the leaf is exposed to sunlight and air, while part $R$ is covered with black paper (blocking light). What are the colours of $Q$ and $R$ when the leaf is tested for starch using iodine solution?

Which is the first enzyme to mix with food in the digestive tract?