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 statements about resolution and magnification are correct?[Table_1]

2018 Summer

MCQ

CH1 - CELL STRUCTURE

An eyepiece graticule has a scale with 100 divisions. A stage micrometer has a scale with 50 divisions, each of which is 0.040 mm apart. Using a ×40 ...

2018 Summer

MCQ

CH1 - CELL STRUCTURE

A prokaryotic cell which is 1 µm in diameter, is magnified 50000 times in an electron micrograph. What is the diameter of the cell in the electron m...

2018 Summer

MCQ

CH1 - CELL STRUCTURE

A scientist carried out an experiment to separate cell structures in animal cells. The cells were broken open to release the cell structures. This ext...

2018 Summer

MCQ

CH1 - CELL STRUCTURE

Radioactively-labelled nucleotides are introduced into a cell.In which cell structures will the radioactivity first become concentrated?

2018 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

What is the general formula for amylose?

2018 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

The diagram shows relationships between some important molecules and bonds. What is represented by circles numbered 1, 2 and 3?

2018 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

In unsaturated lipid molecules, where are double bonds located?

2018 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Phospholipids and triglycerides are important biological molecules.Which properties are correct for these molecules?[Table_1]

2018 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

The diagrams show two arrangements of amino acids in a protein. Which row correctly names the bonds at S or T?

2018 Summer