Theory

CH14 - HOMEOSTASIS

(a) Describe the role of insulin in the regulation of blood glucose concentration........................................................................

2009 Summer

Theory

CH14 - HOMEOSTASIS

(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

CH14 - HOMEOSTASIS

(a) Describe the part played by the proximal convoluted tubules in the functioning of the kidneys. [8] (b) Explain how the collecting ducts in the ki...

2009 Summer

Theory

CH14 - HOMEOSTASIS

(a) Hormones are secreted by endocrine glands.Explain what is meant by the term _endocrine gland_........................................................

2009 Winter

Theory

CH14 - HOMEOSTASIS

(a) The pancreas acts both as an exocrine and an endocrine gland.(i) Describe the parts of the pancreas involved in its endocrine function...............

2009 Winter

Theory

CH14 - HOMEOSTASIS

(a) Explain how two parents, both of whom produce normal amounts of AG, can produce a child with Pompe disease...........................................

2009 Winter

Theory

CH14 - HOMEOSTASIS

(a) Describe the structure of a kidney nephron and its associated blood vessels. [7](b) Explain how glomerular filtrate is formed. [8]

2010 Summer

Theory

CH14 - HOMEOSTASIS

Follicle stimulating hormone (FSH) and luteinising hormone (LH) both consist of two polypeptide chains, the α and β chains.• The α chains of FSH ...

2010 Summer

Theory

CH14 - HOMEOSTASIS

Follicle stimulating hormone (FSH) and luteinising hormone (LH) both consist of two polypeptide chains, the \( \alpha \) and \( \beta \) chains.The \(...

2010 Summer

Theory

CH14 - HOMEOSTASIS

The secretion of insulin by the islets of Langerhans in the pancreas stimulates the liver to reduce the blood glucose concentration.(a) Describe how t...

2010 Winter

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