Practice Questions
1.Explain what is meant by DNA being a polymer.
DNA being a polymer means that it is a large molecule made from many repeating smaller units joined together.
In DNA:
The repeating units are called nucleotides
These nucleotides are linked together in a long chain
2.Describe the structure of a nucleotide.
A nucleotide consists of three parts:
a sugar (deoxyribose)
a phosphate group
and a base
The sugar and phosphate are the same in every nucleotide, but the base can be different (A, T, C, or G).
3.Why is DNA described as a “repeating structure”?
Factors affecting the rate of photosynthesis
Measuring & calculating rates of photosynthesis
Inverse square law and photosynthesis
Economics of enhancing the conditions in greenhouses
Investigating the effect of light intensity on the rate of photosynthesis
Data analysis and nervous system
The effect of a factor on human reaction time
Controlling blood glucose concentration
Regulating water and nitrogen levels in the body.
Hormones and human reproduction
Using hormones to treat infertility
Control and coordination in plants using hormones
Investigating the effect of light or gravity on the growth of newly germinated seedlings