MCQ

CH2 - BIOLOGICAL MOLECULES

Which combination of procedures would not be used in a food test? [Table_1: use heat | use biuret reagent | use Benedict’s reagent | boil with dilu...

2009 Winter

MCQ

CH2 - BIOLOGICAL MOLECULES

The diagram shows a triglyceride molecule that has been partially hydrolysed. What will be the products of the total hydrolysis of the molecule shown?

2009 Winter

MCQ

CH2 - BIOLOGICAL MOLECULES

The diagram shows a tripeptide molecule. At which two points will hydrolysis occur to release three amino acids?

2009 Winter

MCQ

CH2 - BIOLOGICAL MOLECULES

Which combination of bond types correctly shows the weak and strong bonds that hold a molecule of protein in shape? [Table_1: types of bond] hydroge...

2009 Winter

MCQ

CH2 - BIOLOGICAL MOLECULES

Which features of collagen result in it having high tensile strength?1. covalent bonds form between adjacent molecules2. each three-stranded molecule ...

2009 Winter

MCQ

CH2 - BIOLOGICAL MOLECULES

HIV-1 protease is an enzyme produced by the HIV virus.Two identical chains of 99 amino acids form the enzyme. In each chain, amino acids 25, 26 and 27...

2009 Winter

MCQ

CH2 - BIOLOGICAL MOLECULES

Which combination of bond types correctly shows the weak and strong bonds that hold a molecule of protein in shape?[Table showing types of bond: hydro...

2009 Winter

MCQ

CH2 - BIOLOGICAL MOLECULES

Which statement is true for cellulose, but not true for protein?

2009 Winter

MCQ

CH2 - BIOLOGICAL MOLECULES

The diagram shows a triglyceride molecule that has been partially hydrolysed. What will be the products of the total hydrolysis of the molecule show...

2009 Winter

MCQ

CH2 - BIOLOGICAL MOLECULES

The diagram shows a tripeptide molecule. At which two points will hydrolysis occur to release three amino acids?

2009 Winter

Theory

CH2 - BIOLOGICAL MOLECULES

(a) Fig. 1.1 shows the breakdown of a molecule of sucrose.(i) Name the bond indicated by T...............................................................

2010 Summer

Theory

CH1 - CELL STRUCTURE

(a) Calculate the actual diameter of the alveolus along the line X–Y.Show your working and give your answer to the nearest micrometre.Answer = ........

2010 Summer

Theory

CH8 - TRANSPORT IN MAMMALS

(a) Fig. 3.1 shows a cross-section of the heart at the level of the valves.[Image_1: Fig. 3.1](i) Complete the following flow chart to show the pathwa...

2010 Summer

Theory

CH10 - INFECTIOUS DISEASE

Malaria and tuberculosis (TB) are two of the most important infectious diseases.(a) Define the term \textit{infectious disease}..........................

2010 Summer

Theory

CH6 - NUCLEIC ACIDS AND PROTEIN SYNTHESIS

(a) Name the stage during the mitotic cell cycle when replication of DNA occurs..........................................................................

2010 Summer

Theory

CH1 - CELL STRUCTURE

(a) Name the processes that occur at H, J and K.H .......................................................................................................

2010 Summer

Theory

CH1 - CELL STRUCTURE

(a) Explain how Fig. 1.1 can be identified as a plant cell...............................................................................................

2010 Summer

Theory

CH8 - TRANSPORT IN MAMMALS

Fig. 2.1 is a diagram of a vertical section through a healthy mammalian heart. (a) (i) Label the two chambers of the heart by writing in the boxes pro...

2010 Summer

Theory

CH10 - INFECTIOUS DISEASE

(a) Using the ‘without HIV/AIDS’ and ‘with HIV/AIDS’ data shown in Table 3.1, calculate the percentage decrease in life expectancy for Botswan...

2010 Summer

Theory

CH2 - BIOLOGICAL MOLECULES

Fig. 4.1 shows the primary structure of a lysozyme molecule, an enzyme found in tears, saliva and in lysosomes. (a) (i) Explain what is meant by th...

2010 Summer