Unit 4 Test Review

What is the role of ligase in DNA replication?

• Unzips DNA strands
• Adds new nucleotides
• Forms nucleosomes
• Joins Okazaki fragments

What are the two functions of nucleic acids?

• Producing chemicals of life and determining characteristics of an individual
• Storing energy and regulating cell processes
• Breaking down nutrients and removing waste
• Carrying genetic information and instructions for protein synthesis

Why is DNA packing important in eukaryotic cells?

• To save space
• To protect the DNA
• To make it easier to replicate
• To make it easier to transcribe

What is the structure formed when DNA wraps around histones?

• Gene
• Chromatin
• Chromosome
• Nucleosome

What is the difference between DNA and RNA?

• DNA contains deoxyribose sugar, RNA contains ribose sugar
• DNA contains uracil, RNA contains thymine
• DNA is single-stranded, RNA is double-stranded
• DNA is found in the nucleus, RNA is found in the cytoplasm

What is the role of primase in DNA replication?

• To repair DNA strands
• To start the replication process
• To add new nucleotides
• To unzip the DNA

What is the function of a gene?

• To carry genetic information
• To produce proteins
• To regulate cell processes
• To break down nutrients

What is the function of histones in DNA packing?

• To protect DNA from damage
• To prevent DNA replication
• To increase the size of the cell
• To help make the DNA molecule smaller

What is the relationship between nucleotides and nitrogenous bases?

• Nucleotides bond with nitrogenous bases
• Nucleotides contain nitrogenous bases
• Nucleotides are attracted to nitrogenous bases
• Nucleotides are made up of nitrogenous bases

What is the purpose of DNA packing in eukaryotic cells?

• To increase the size of the cell
• To save space inside the nucleus

• To prevent DNA replication
• To protect DNA from damage