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

Which of the cell organelles will be clearly visible under the high power (×400) of the light microscope? [Table_1]

2016 Summer

3

MCQ

CH1 - CELL STRUCTURE

The drawing from an electron micrograph shows a ciliated epithelial cell, magnified \times 1500, which is found in the trachea. Line X-Y shows the wid...

2016 Summer

2

MCQ

CH1 - CELL STRUCTURE

What are correct locations of ribosomes in the typical eukaryotic cell?1. free in the cytoplasm2. attached to the outside of the endoplasmic reticulum...

2016 Summer

4

MCQ

CH1 - CELL STRUCTURE

Visking tubing is an artificial partially permeable membrane used to demonstrate diffusion. Glucose molecules can pass through the pores in the membra...

2016 Summer

3

MCQ

CH1 - CELL STRUCTURE

What are found in both chloroplasts and typical prokaryotic cells?

2016 Summer

4

MCQ

CH2 - BIOLOGICAL MOLECULES

Two solutions, 1 and 2, one containing starch and sucrose, and the other containing glucose and protein, were tested with a variety of reagents to con...

2016 Summer

3

MCQ

CH2 - BIOLOGICAL MOLECULES

X and Y are two monomers found in biological polymers.[Image: Monomers X and Y]Which monomer is found in each of cellulose, glycogen, amylopectin and ...

2016 Summer

3

MCQ

CH2 - BIOLOGICAL MOLECULES

Chitin is a polysaccharide consisting of long straight chains of the monosaccharide acetylglucosamine, linked by 1,4 glycosidic bonds.Acetylglucosamin...

2016 Summer

3

MCQ

CH2 - BIOLOGICAL MOLECULES

Which statement about triglycerides is correct?

2016 Summer

3

MCQ

CH2 - BIOLOGICAL MOLECULES

The diagrams show the structures of two amino acids, one of which has two amine (–NH₂) groups and the other has two carboxylic (–COOH) groups. ...

2016 Summer

3