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

CH7 - TRANSPORT IN PLANTS

(a) The structure of a phloem sieve tube element is adapted to its function.Each of explanations A to F describes how a particular structural feature ...

2020 Spring

Theory

CH3 - ENZYMES

Phosphatidate phosphatase (PAP) enzymes have an important role in lipid metabolism.The reaction catalysed by PAP is shown in Fig. 2.1.Experiments were...

2020 Spring

Theory

CH8 - TRANSPORT IN MAMMALS

During one cardiac cycle:blood enters the heart from the lungs and from the rest of the bodyblood leaves the heart to be transported to the lungs and ...

2020 Spring

Theory

CH9 - GAS EXCHANGE AND SMOKING

(a) When a section of lung tissue is viewed using a light microscope, it is possible to identify the trachea, the bronchus, the bronchioles and the al...

2020 Spring

Theory

CH11 - IMMUNITY

Myasthenia gravis and HIV/AIDS both involve disorders of the immune system.(a) Outline why myasthenia gravis is described as a disorder of the immune ...

2020 Spring

Theory

CH1 - CELL STRUCTURE

Fig. 6.1 is a transmission electron micrograph of a plant parenchyma cell.(a) The external environment of the parenchyma cell has a higher water poten...

2020 Spring

Theory

CH14 - HOMEOSTASIS

(a) Fig. 1.1 represents part of the wall of a proximal convoluted tubule (pct) in a kidney nephron.[Image_1: Fig. 1.1](i) Name the features of the wal...

2020 Spring

Theory

CH11 - IMMUNITY

Severe combined immunodeficiency (SCID) is a group of life-threatening diseases. SCID is caused by mutations that prevent the normal function of the i...

2020 Spring

Theory

CH16 - INHERITED CHANGE

Flowers of the common morning-glory plant, Ipomoea purpurea, can have several different phenotypes. An example of these flowers is shown in Fig. 3.1.[...

2020 Spring

Theory

CH16 - INHERITED CHANGE

The rainbow trout, Oncorhynchus mykiss, is a fish that is bred in commercial fish farms. Rainbow trout that have a blue-silver colour are sold at a hi...

2020 Spring