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

Theory

CH1 - CELL STRUCTURE

(a) (i) Name the cells labelled A and the structure labelled B.A ........................................................................................

2013 Summer

2

Theory

CH10 - INFECTIOUS DISEASE

(a) Explain how the virus that causes measles is transmitted.............................................................................................

2013 Summer

2

Theory

CH7 - TRANSPORT IN PLANTS

(a) Transpiration is often described as an 'inevitable consequence of gas exchange in plants'.Explain what is meant by this statement....................

2013 Summer

1

Theory

CH6 - NUCLEIC ACIDS AND PROTEIN SYNTHESIS

Fig. 4.1 shows the two base pairs in a DNA molecule.(a) Name the bases labelled J and K and the bond labelled L.J .......................................

2013 Summer

1

Theory

CH4 - CELL MEMBRANES AND TRANSPORT

Fig. 5.1 shows a section of a cell surface membrane.(a) State the functions of structures P, Q and R.P ..................................................

2013 Summer

2

Theory

CH5 - THE MITOTIC CELL CYCLE

(a) Explain how uncontrolled cell division can result in cancer. ........................................................................................

2013 Summer

2

Theory

CH5 - THE MITOTIC CELL CYCLE

(a) The cells in Fig. 1.1 are from the same organism and look the same. The cells in Fig. 1.1(a) have been produced by mitosis and the cells in Fig. 1...

2013 Summer

2

Theory

CH7 - TRANSPORT IN PLANTS

Fig. 2.1 shows xylem tissue in a longitudinal section through the stem of a dicotyledonous plant. [Image_1: Fig. 2.1] (a) Describe and explain how the...

2013 Summer

2

Theory

CH10 - INFECTIOUS DISEASE

(a) Explain why tuberculosis (TB) is known as an infectious disease......................................................................................

2013 Summer

3

Theory

CH2 - BIOLOGICAL MOLECULES

Polysaccharides are synthesised by condensation reactions between monosaccharide or disaccharide subunits (monomers).(a) Name the type of bond formed ...

2013 Summer

3