Theory

CH13 - PHOTOSYNTHESIS

(a) Fig. 8.1 shows a scanning electron micrograph of a section through a leaf of the Christmas rose, *Helleborus niger*.[Image_1: Fig. 8.1]Name M and ...

2009 Summer

Theory

CH13 - PHOTOSYNTHESIS

(a) Fig. 8.1 shows the results from two experiments carried out to investigate the effect of light intensity and carbon dioxide concentration on the r...

2009 Winter

Theory

CH13 - PHOTOSYNTHESIS

(a) In Queensland, Australia, the effect of the water-holding capacity of soil on the yield of sorghum and wheat was investigated.• Four test plots ...

2009 Winter

Theory

CH13 - PHOTOSYNTHESIS

(a) In the majority of plants the leaf is the main photosynthetic organ. List four ways in which the structure of a dicotyledonous leaf is adapted for...

2009 Winter

Theory

CH13 - PHOTOSYNTHESIS

Fig. 4.1 is a photomicrograph of a transverse section through the leaf of a C4 plant.(a) (i) Identify structures J to L. J ..............................

2010 Summer

Theory

CH13 - PHOTOSYNTHESIS

(a) Explain how the palisade mesophyll cells of a leaf are adapted for photosynthesis. [8](b) Outline the light-independent stage of photosynthesis. [...

2010 Summer

Theory

CH13 - PHOTOSYNTHESIS

Cereal crops, such as sorghum and rice, are a major source of nutrients all over the world.(a) Explain why cereal crops are important components of ma...

2010 Summer

Theory

CH13 - PHOTOSYNTHESIS

(a) Describe the structure of photosystems and explain how a photosystem functions in cyclic photophosphorylation. [8] (b) Explain briefly how reduced...

2010 Summer

Theory

CH13 - PHOTOSYNTHESIS

Cereal crops, such as sorghum and rice, are a major source of nutrients all over the world.(a) Explain why cereal crops are important components of ma...

2010 Summer

Theory

CH13 - PHOTOSYNTHESIS

(a) Describe the structure of photosystems and explain how a photosystem functions in cyclic photophosphorylation. [8](b) Explain briefly how reduced ...

2010 Summer

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