Theory

CH15 - CONTROL AND CO-ORDINATION

(a) Fig. 1.1 is a diagram of a motor neurone of a rat and a motor neurone of a snail.(i) Name the structures labelled A, B and C on Fig. 1.1.............

2024 Winter

3

Theory

CH15 - CONTROL AND CO-ORDINATION

(a) Striated muscle is composed of myofibrils. Myofibrils contain several structural proteins including troponin, tropomyosin, actin and myosin.Outlin...

2024 Spring

3

Theory

CH15 - CONTROL AND CO-ORDINATION

(a) A touch stimulus to an $M. pudica$ leaf causes an action potential to be generated. The action potential results in changes in cells, which cause ...

2024 Winter

3

Theory

CH15 - CONTROL AND CO-ORDINATION

The scientist Gregor Mendel investigated differences in the length of the stem in the pea plant, Pisum sativum. In 1866, he published the results of h...

2024 Spring

2

Theory

CH15 - CONTROL AND CO-ORDINATION

Humans detect the sweet taste of sucrose sugar using chemoreceptor cells in taste buds on the tongue. The red admiral butterfly, Vanessa atalanta, det...

2024 Summer

3

Theory

CH15 - CONTROL AND CO-ORDINATION

(a) Coordination in humans involves two main systems: the nervous system and the endocrine system. Paracrine cell signalling is a third way in which c...

2024 Summer

3

Theory

CH15 - CONTROL AND CO-ORDINATION

(a) Fig. 8.1 is a diagram of a sensory neurone.(i) Name the type of cell represented by cell A. [1]......................................................

2024 Summer

3

Theory

CH15 - CONTROL AND CO-ORDINATION

(a) Fig. 8.1 is a diagram of a motor neurone.[Image of motor neurone labeled X, Y, Z] (i) Name cell X and part Y.........................................

2024 Winter

3

Theory

CH15 - CONTROL AND CO-ORDINATION

(a) An investigation was carried out to study the effect of different intensities of blue light on the percentage germination of barley seeds. Barley ...

2024 Spring

3

Theory

CH15 - CONTROL AND CO-ORDINATION

(a) Fig. 10.1 is a diagram of part of a neurone membrane while the resting potential is maintained. On Fig. 10.1, use label lines and letters to label...

2024 Summer

3

MCQ

CH1 - CELL STRUCTURE

A cell organelle measures $4 \times 10^{-1}$ mm in diameter.What is the diameter in $\mu$m?

2011 Summer

2

MCQ

CH1 - CELL STRUCTURE

In the following table, which is the correct comparison between light and electron microscopes? [Table_1: light microscope and electron microscope co...

2011 Summer

3

MCQ

CH1 - CELL STRUCTURE

Which structures are present in a typical plant cell? [Table_1]

2011 Summer

3

MCQ

CH1 - CELL STRUCTURE

Plant cells are stained and then viewed through a light microscope.Which structures would be clearly visible at a magnification of ×400?

2011 Summer

2

MCQ

CH1 - CELL STRUCTURE

Which type of cell will contain the highest proportion of single membrane-bound structures?

2011 Summer

3

MCQ

CH2 - BIOLOGICAL MOLECULES

Four different fruit juices, A, B, C and D, were tested with Benedict's solution. A second sample of each juice was hydrolysed and tested with Benedic...

2011 Summer

1

MCQ

CH2 - BIOLOGICAL MOLECULES

Which molecular bonds will be broken by hydrolysis when a molecule of glycogen is converted to glucose? [Table_1]

2011 Summer

2

MCQ

CH2 - BIOLOGICAL MOLECULES

Which set of statements correctly describes haemoglobin?

2011 Summer

2

MCQ

CH2 - BIOLOGICAL MOLECULES

Some foods contain 'hydrogenated vegetable oils'. These are unsaturated fats that have been converted to saturated fats.Which property of the fats wil...

2011 Summer

2

MCQ

CH2 - BIOLOGICAL MOLECULES

Which rows show the chemical groups present in the biological molecules listed?[Table_1]

2011 Summer

2