Theory

CH16 - INHERITED CHANGE

Populations of the moth *Biston betularia* live in Europe and in North America. The most common phenotype on both continents is a pale wing colour wit...

2024 Winter

3

Theory

CH16 - INHERITED CHANGE

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

CH16 - INHERITED CHANGE

Variation exists in populations of a species and this may provide the opportunity for evolution to occur.(a) Phenotypic variation exists in many forms...

2024 Summer

3

Theory

CH16 - INHERITED CHANGE

The tortoise beetle, Chelymorpha alternans, is an insect found in Panama that has several different colour patterns. Fig. 3.1 shows a tortoise beetle....

2024 Summer

2

Theory

CH16 - INHERITED CHANGE

Cystic fibrosis is an autosomal recessive genetic disease. People with cystic fibrosis have a homozygous recessive genotype. (a) Explain the meaning ...

2024 Spring

2

Theory

CH16 - INHERITED CHANGE

(a) Structures A and B and the thallus of L. cruciata are haploid.Explain what is meant by haploid.......................................................

2024 Winter

3

Theory

CH16 - INHERITED CHANGE

Genes have a role in determining the overall phenotype of an organism.(a) Using haemophilia as an example, explain the relationship between a gene, a ...

2024 Summer

2

Theory

CH16 - INHERITED CHANGE

Holstein Friesian cattle are a breed of cattle used by dairy farmers in many countries of the world for the high milk yield of their cows.Fig. 4.1 sho...

2024 Spring

4

Theory

CH16 - INHERITED CHANGE

Genetic crosses can be used to investigate patterns of inheritance.(a) A mutation in a gene involved in fruit colour in tomato plants, _Solanum lycope...

2024 Winter

3

Theory

CH16 - INHERITED CHANGE

(a) Fig. 6.1 is a diagram of part of a mitochondrion.On Fig. 6.1, use arrows to show the route taken by oxygen from the cytoplasm into the mitochondri...

2024 Summer

2

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