Unit 4 Genetics Test Review

Where does DNA replication take place in humans?

• Cytoplasm

• Nucleus

• Ribosome

• Vacuole

RNA from a lion is compared to RNA from a cactus. Both will contain the

•  sugar deoxyribose and the base thymine

•  sugar deoxyribose and the base uracil

• sugar ribose and the base thymine

•  sugar ribose and the base uracil

Which of the four molecules is DNA, based on the table to the left?

•  Molecule 1

•  Molecule 2

•  Molecule 3

•  Molecule 4

Tags

NGSS.HS-LS1-1

The diagram shown here represents a portion of a nucleic acid molecule.  The part indicated by the arrow could be

• adenine

• uracil

• deoxyribose

• phosphate

Tags

NGSS.HS-LS1-1

A DNA nucleotide could contain the following molecules:

• deoxyribose, cytosine, and a lipid

• deoxyribose, thymine, and a phosphate group

•  ribose, uracil, and a polypeptide

• ribose, adenine, and thymine

Use the diagram to the left AND your knowledge of biology to answer this question.  Structures 3 and 4 are held together by

• weak peptide bonds

•  strong hydrogen bonds

• weak hydrogen bonds

•  strong peptide bonds

In nucleotides, the letters A, G, C, and T represent

• phosphate groups

• deoxyribose sugars

• nitrogen bases

• ribose sugars

The cellular process of creating two new DNA molecules from one original copy is called replication. Which statement is the BEST description of this process?

•  DNA opens up and RNA copies it.

• DNA opens up and completely unwinds to make two new molecules. 

•  DNA opens up and each strand is used as a template for making a new strand. 

• RNA opens up the DNA and uses each strand as a template for a new strand.

What three parts make up a nucleotide? 

• sugar, protein, nitrogen

• phosphate, sugar, nitrogenous base

• carbs, lipids, proteins.

• sugar, polypeptide, protein

DNA Replication is called “semi conservative” because

• because when DNA is replicated, part of the original strand of DNA is saved to make the new strand

• DNA Replication doesn’t actually copy DNA

• DNA replication occurs from mRNA

• DNA replication is not called “semi conservative”