Here are the Short Answer Questions for 2015 Biology Exam Paper. The Answers are provided at the end of the Post. Check the other post for Part A: Multiple Choice Questions
a) Which structure shown in the cell above makes it hard for herbivores to digest? (1)
b) i) Name two (2) of the three (3) important raw materials needed by plants for photosynthesis. (2)
ii) Ions and minerals enter plants via root hairs and roots. Explain how these ions and minerals are
then absorbed by the rest of the plant. (2)
c) Explain how oxygen is produced as a by-product of photosynthesis. (2)
a) i) Name the structure(s) in the lungs responsible for efficient gaseous exchange. (1)
ii) By referring to your answer in i) above, explain how the structure suits the function. (2)
b) Amphibians use internal nares to breathe on the land. How do they breathe when in damp places,
for example, in a pond? Explain. (2)
c) The isomers of galactose and glucose are both monosaccharaides. In cellular respiration, the human
body only recognises glucose and not galactose.
How will cellular respiration proceed if only galactose is present? (1)
d) Name the process by which sugars are burned in cells to generate overall energy. (1)
a) In humans, sometimes the sugar level drops below the normal levels and something has to be done
to bring the sugar level back to normal levels.
Name the hormone that does that and explain how it does so. (2)
b) i) If the Schwann cells wrapped around a motor axon are damaged, what would be the likely
ii) The brain receives information from which part of the peripheral nervous system? (1)
c) A farmer is desperate to sell his freshly harvested raw bananas at a local food and vegetable market.
He is faced with the problem that the bananas are not ready.
Name the plant hormone that would solve his problem. (1)
d) The bananas were harvested from plants growing in complete shade.
What type of tropism are they reflecting? (1)
a) Fill in the blanks with the most correct word.
A gene that codes for a characteristic is made up of two different copies called _______________.
One copy is dominant to the other and controls a character that is expressed. Expressed characters
are called _______________. (2)
b) A nucleotide is made up of a base, a phosphate and a ______________. The bases are of four (4)
types, in DNA uracil is replaced by ________________. (2)
c) In sexually reproducing organisms, crossing over is a process that results in the varieties of
differences observed. Explain the term crossing-over. (2)
d) Restriction enzymes are used to cut DNA into smaller fragments.
What are enzymes? (1)
Biology Exam Questions and Papers
We at PNG Education News site would like to help students who are doing Year 11 and 12 at the Upper Secondary Schools by publishing exam like Questions. We will post questions in Biology on this Section.