Unit 4 review (DNA and Genetics)

A DNA molecule is shaped like a

• toilet

• cone

• ball

• spiraled ladder

An ______________ trait is a trait we get from our parents.

• environmental

• inherited

What are the four nitrogen bases?

• adenine, thymine, guanine, cytosine
• adenine, lysine, prolene, guanine
• arganine, cytosine, lysine, purine
• lysine, cytosine, lucine, guanine

What is DNA

• donuts need algea

• did no algebra

• do not answer

• deoxyribonucleic acid

Adenine bonds with ______________.

• Guanine
• Thymine
• Cytosine
• Adenine

Guanine bonds with ______________.

• Adenine
• Guanine
• Cytosine
• Thymine

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

Where is DNA located in a eukaryotic cell?

• nucleus

• cell membrane

• mitochondria

• cytoplasm

What are sections of DNA called?

• DNA

• Genes

• Chromosomes

• Nucleus

Select the most accurate claim about chromosomes, genes and DNA.

• Chromosomes, genes and DNA work together inside of the cells of organisms.

• Chromosomes hold DNA.

• Chromosomes are made up of long strands of DNA which contain segments of genes.

• Genes are found inside of segments of DNA strands.