Theory

CH12 - ENERGY AND RESPIRATION

(a) The respiratory quotient (RQ) is used to show what substrates are being metabolised in respiration.The RQ of a substrate may be calculated using t...

2009 Summer

Theory

CH12 - ENERGY AND RESPIRATION

(a) Describe the process of glycolysis. [7] (b) Describe the structure and synthesis of ATP and its universal role as the energy currency in all livi...

2009 Winter

Theory

CH12 - ENERGY AND RESPIRATION

(a) Outline the main features of the Krebs cycle. [9](b) Explain the role of NAD in aerobic respiration. [6]

2009 Winter

Theory

CH12 - ENERGY AND RESPIRATION

(a) The initial stages of respiration convert one molecule of glucose into two molecules of a 3C compound.State(i) the name given to these initial sta...

2010 Summer

Theory

CH12 - ENERGY AND RESPIRATION

Fig. 7.1 is an outline diagram of the Krebs cycle. A two carbon acetyl group enters the cycle by combining with a molecule of oxaloacetate. A molecule...

2010 Summer

Theory

CH12 - ENERGY AND RESPIRATION

(a) (i) Explain what is meant by the following terms:decarboxylation ....................................................................................

2010 Summer

Theory

CH12 - ENERGY AND RESPIRATION

Rice, *Oryza sativa*, is a staple food in many parts of the world. Rice is often grown in fields that are flooded with water for part of the growing s...

2010 Winter

Theory

CH12 - ENERGY AND RESPIRATION

(a) Outline the need for energy in living organisms using named examples. [9](b) Explain the different energy values of carbohydrate, lipid and protei...

2010 Winter

Theory

CH12 - ENERGY AND RESPIRATION

Rice, Oryza sativa, is a staple food in many parts of the world. Rice is often grown in fields that are flooded with water for part of the growing s...

2010 Winter

Theory

CH12 - ENERGY AND RESPIRATION

(a) Outline the need for energy in living organisms using named examples. [9](b) Explain the different energy values of carbohydrate, lipid and protei...

2010 Winter

MCQ

CH1 - CELL STRUCTURE

Which organelles are enclosed in a single phospholipid bilayer and contain hydrolytic enzymes?

2017 Summer

MCQ

CH1 - CELL STRUCTURE

The DNA of prokaryotes is naked and circular.Which statement describes how the DNA of eukaryotes differs from that of prokaryotes?

2017 Summer

MCQ

CH1 - CELL STRUCTURE

The recently discovered Pandoravirus measures 1000 nm in diameter.The Mimivirus has a diameter of 400 nm.What can be detected using a light microscope...

2017 Summer

MCQ

CH1 - CELL STRUCTURE

What are found in chloroplasts and mitochondria?1. DNA2. 70S ribosomes3. mRNA

2017 Summer

MCQ

CH1 - CELL STRUCTURE

Boiling the bones and teeth from dead animals can be used to produce a type of glue. The glue is formed from the collagen fibres present in bones and ...

2017 Summer

MCQ

CH1 - CELL STRUCTURE

What describes the primary structure of a protein?

2017 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

The diagrams show four monosaccharides with the formula $C_6H_{12}O_6$.Which diagram shows $\alpha$-glucose?

2017 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Complete digestion of polysaccharides requires all the glycosidic bonds between the monomers to be broken.Amylase only breaks $\alpha$-1,4 glycosidic ...

2017 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

The diagram shows the results of tests on four solutions containing biological molecules. Which shows the solution that contains only starch and prote...

2017 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

The enzyme invertase catalyses the breakdown of sucrose to glucose and fructose.Three different enzyme inhibitors of invertase X, Y and Z were investi...

2017 Summer