U5/M2-3 Test Review & Practice

What is a gene

• a section of DNA that codes for a trait

• a pair of pants that are made of denim

• the whole entire chromosome found in the nucleus

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

Mutations can be...

• Harmful

• Beneficial

• Neutral

• All of the Above

A point mutation (substitution) occurs when

• a base pair is missing from the DNA strand

• a base pair is added to the DNA strand

• a base pair is replaced with a different base pair

A type of point mutation (substitution) that has no effect

on amino acids sequence

• Missense Mutation

• Nonsense Mutation

• Silent Mutation

• Frameshift Mutation

A nucleotide base is inserted or deleted shifting the entire DNA sequence. Entire protein will be changed.

• Missense Mutation

• Silent Mutation

• Frameshift Mutation

• Nonsense Mutation

Which of the following best describes a DNA molecule?

• double helix
• contains ribose
• made of amino acids
• contains Uracil

In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of

• cytosine
• guanine
• thymine
• uracil

Why is DNA important?

• it is very small and very complicated
• it's in everything
• it serves as the blueprint for traits of all living things
• because we eat it every day for energy

Which 2 molecules form the sides (backbone) of the DNA ladder?

• deoxyribose sugar and adenine
• deoxyribose sugar and a hydrogen bond
• deoxyribose sugar and the nucleus
• deoxyribose sugar and phosphate