Protein functions, nucleic acids and the amylase experiment
Answers are for parents and teachers.
1
List 5 functions of proteins with examples in a table.
Enzyme: amylase; transport: haemoglobin; defence: antibody; movement: myosin; hormone: insulin.
2
If a DNA strand is TACCGATG, write the complementary strand.
ATGGCTAC
3
If cytosine is 18 % of DNA, what percent is adenine? (G = C; A = T)
32
4
Describe the structure of ATP in 2–3 sentences.
ATP consists of adenine, ribose and three phosphate residues; the phosphate bonds are rich in energy.
5
In the amylase experiment, why does the enzyme work well near 37 °C?
This is normal human body temperature; at it the enzyme keeps its structure and is active, while at high temperature it denatures.