1.
State what is meant by a condensation reaction. [1]
JD SCIENCE
Module 2 Foundations in biology
Answer all questions. Show working. Answers are in a separate file on the Worksheets page — do not look at them until you have finished.
2.
State what is meant by hydrolysis. [1]
3.
State what is meant by α-glucose. [1]
4.
State what is meant by starch. [1]
5.
State what is meant by cellulose. [1]
6.
State what is meant by a triglyceride. [1]
7.
State what is meant by a phospholipid. [1]
8.
State what is meant by the primary structure of a protein. [1]
9.
State what is meant by an enzyme. [1]
10.
State what is meant by a nucleotide. [1]
11.
Grace is asked about a condensation reaction in a OCR Biology paper.
(a) Describe a condensation reaction. [2]
(b) Explain why a condensation reaction is important in this topic. [3]
12.
Grace is asked about hydrolysis in a OCR Biology paper.
(a) Describe hydrolysis. [2]
(b) Explain why hydrolysis is important in this topic. [3]
13.
Grace is asked about α-glucose in a OCR Biology paper.
(a) Describe α-glucose. [2]
(b) Explain why α-glucose is important in this topic. [3]
14.
Grace is asked about starch in a OCR Biology paper.
(a) Describe starch. [2]
(b) Explain why starch is important in this topic. [3]
15.
Grace is asked about cellulose in a OCR Biology paper.
(a) Describe cellulose. [2]
(b) Explain why cellulose is important in this topic. [3]
16.
Grace is asked about a triglyceride in a OCR Biology paper.
(a) Describe a triglyceride. [2]
(b) Explain why a triglyceride is important in this topic. [3]
17.
A dipeptide is hydrolysed. How many water molecules are needed? [3]
18.
A polypeptide has 50 amino acids. How many peptide bonds? [3]
19.
Rf of a chromatogram spot 3.0 cm, solvent 7.5 cm [3]
20.
Enzyme rate is 24 units at 20°C and 48 at 30°C. Q10 [3]
21.
A DNA strand is 12% A. Percentage T [3]
22.
If A=12% in DNA, percentage G [3]
23.
Grace carries out a OCR-style required practical linked to biological molecules. This is a typical OCR required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
24.
Grace carries out collecting valid data for biological molecules. This is a typical OCR required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
25.
Grace carries out drawing a graph for biological molecules. This is a typical OCR required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
26.
Grace carries out evaluating a method about biological molecules. This is a typical OCR required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
27.
Compare a condensation reaction with hydrolysis. [4]
28.
Compare hydrolysis with α-glucose. [4]
29.
Compare α-glucose with starch. [4]
30.
Compare starch with cellulose. [4]
31.
Apply your knowledge of a phospholipid to this situation: bilayer [3]
32.
Apply your knowledge of the primary structure of a protein to this situation: determined by DNA [3]