Theory

CH17 - SELECTION AND EVOLUTION

(a) Explain how changes in the nucleotide sequence of DNA may affect the amino acid sequence in a protein.[7](b) Explain how natural selection may bri...

2009 Summer

Theory

CH17 - SELECTION AND EVOLUTION

(a) *Asellus aquaticus* is a small freshwater crustacean. 200 *A. aquaticus* were released into a pond where there had previously been none. The pond...

2009 Winter

Theory

CH17 - SELECTION AND EVOLUTION

(a) Complete Fig. 4.1 by writing letters to represent the sets of chromosomes in bread wheat.(b) Explain why hybridisation between emmer wheat and goa...

2009 Winter

Theory

CH17 - SELECTION AND EVOLUTION

(a) A recent study of the house mouse, Mus musculus, on the island of Madeira resulted in the following observations. • There are six distinct popul...

2009 Winter

Theory

CH17 - SELECTION AND EVOLUTION

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

2009 Winter

Theory

CH17 - SELECTION AND EVOLUTION

Anole lizards are found throughout the Caribbean and the surrounding mainland. There are many species. Each species is found only on one island or a s...

2010 Summer

Theory

CH17 - SELECTION AND EVOLUTION

The American crocodile, Crocodylus acutus, was classified as an endangered species by the USA in 1975. It is found in estuarine regions of southern Fl...

2010 Summer

Theory

CH17 - SELECTION AND EVOLUTION

The fruitfly, _Drosophila_, has many different species. Three of these species, _Drosophila pseudoobscura_, _D. persimilis_ and _D. miranda_, are thou...

2010 Summer

Theory

CH17 - SELECTION AND EVOLUTION

The American crocodile, Crocodylus acutus, was classified as an endangered species by the USA in 1975. It is found in estuarine regions of southern Fl...

2010 Summer

Theory

CH17 - SELECTION AND EVOLUTION

The fruitfly, \textit{Drosophila}, has many different species. Three of these species, \textit{Drosophila pseudoobscura}, \textit{D. persimilis} and \...

2010 Summer

MCQ

CH1 - CELL STRUCTURE

A student used a light microscope to observe a blood smear on a microscope slide.An eyepiece graticule was used to measure the diameter of a white blo...

2024 Spring

MCQ

CH1 - CELL STRUCTURE

Which statement explains why it is necessary to use an electron microscope to see the cristae of a mitochondrion?

2024 Spring

MCQ

CH1 - CELL STRUCTURE

Some stains can be used to identify cell structures in living cells.A dilute solution of one stain causes the whole cell to appear blue.The blue colou...

2024 Spring

MCQ

CH1 - CELL STRUCTURE

When mucus is secreted from a goblet cell, these events take place.1 addition of carbohydrate to protein2 fusion of a vesicle with the cell surface me...

2024 Spring

MCQ

CH1 - CELL STRUCTURE

The diagram shows four biological features. Which biological features are present in typical prokaryotes?

2024 Spring

MCQ

CH1 - CELL STRUCTURE

Which row shows features that occur in dicotyledonous plant cells and also in typical bacterial cells?key✓ = found in dicotyledonous plant cells and...

2024 Spring

MCQ

CH2 - BIOLOGICAL MOLECULES

Which flow chart outlining the test for non-reducing sugars is correct?

2024 Spring

MCQ

CH2 - BIOLOGICAL MOLECULES

Which diagrams show the release of a water molecule during the formation of a glycosidic bond?[Image_1: Shows three chemical diagrams each illustratin...

2024 Spring

MCQ

CH2 - BIOLOGICAL MOLECULES

Which molecules have a structural formula that contains C=O bonds? 1. amino acids 2. fatty acids 3. glycerol 4. protein

2024 Spring

MCQ

CH2 - BIOLOGICAL MOLECULES

Which statement about triglycerides is correct?

2024 Spring