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

What are the appropriate units for measuring diameters of alveoli, diameters of white blood cells and the width of cell walls?[Table_1]

2015 Summer

MCQ

CH1 - CELL STRUCTURE

The diagram shows a high-power drawing of a bacterium. Which three components are found in both this bacterium and an animal cell?

2015 Summer

MCQ

CH1 - CELL STRUCTURE

The diagram shows a stage micrometer scale on which the small divisions are 0.1 mm. It is viewed through an eyepiece containing a graticule. The st...

2015 Summer

MCQ

CH1 - CELL STRUCTURE

Which structures are found in typical eukaryotic cells?1. 70S ribosomes2. 80S ribosomes3. linear DNA (chromosomes)4. circular DNA

2015 Summer

MCQ

CH1 - CELL STRUCTURE

What is the function of the nucleolus?

2015 Summer

MCQ

CH1 - CELL STRUCTURE

The electronmicrograph shows a cell. What is the actual diameter of the nucleus?

2015 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

A student carried out four tests for biological molecules on a solution. The observations are shown in the table.[Table_1]Which molecules may be prese...

2015 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

The diagrams show different types of bond found in biological molecules.Which combination of bonds could not be found in a protein with a tertiary str...

2015 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Which row shows the correct match between the descriptions of biological molecules and where they are found?1 a linear polymer of 1,4 linked β-glucos...

2015 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Which is the correct description for the structure of amylose and cellulose? [Table_1]

2015 Summer