Tranby Year 10 Science Semester One Revision

What are the parts of a nucleotide?

• phosphate, sugar, base

• A, T, G, C

• Nucleic Acids

• two base pairs connected

What is this a picture of?

• nucleotide

• DNA strand

• chromosome

• gene

Label the picture in order:

• phosphate ; sugar ; base

• phosphate ; base ; sugar

• base ; sugar ; phosphate

• base ; phosphate ; sugar

DNA is shaped in a:

• double helix

• tightly packed swirl

• twisted ladder

• nucleotide

A __________ is a segment of DNA that codes for a particular protein, which leads to a particular trait.

• Gene
• Allele
• Codon
• Nucleotide

_________________ is the genetic makeup or combination of alleles in an organism.

• The phenotype

• The genotype

What do you call the physical expression of a gene?

• genotype
• dominant
• phenotype
• allele

A mutation is defined as:

• A change in the cell's structure

• Anything that changes in an embryo

• Any change in the physical features of a human

• A change in the DNA sequence

Where do mutations occur?

• DNA and RNA
• DNA 
• RNA
• mRNA and tRNA

Are all mutations bad?

• Yes
• No