DNA Study Guide Questions

DNA: Made of repeating… What are the repeating units that make up DNA?

• Nucleotides

• Amino acids

• Chromosomes

• Ribosomes

DNA: 3 Parts of a nucleotide — Select the three components found in a DNA nucleotide.

• Phosphate group

• Deoxyribose sugar

• Nitrogenous base

• Fatty acid

• Uracil

DNA: Complementary Base Pairs — Select the correct complementary base pairs in DNA.

• Adenine–Thymine

• Cytosine–Guanine

• Adenine–Cytosine

• Guanine–Thymine

DNA: Shape/Structure — What is the shape of DNA?

• Double helix

• Single strand

• Ring-shaped plasmid

• Straight ladder with no twist

DNA: Where is it found in the cell? — Where is most DNA located in a eukaryotic cell?

• Nucleus

• Cell membrane

• Cytoplasm

• Ribosome

DNA: Function — What is the main function of DNA in living things?

• Stores genetic information and instructions for traits

• Provides immediate energy for the cell

• Transports oxygen through the body

• Breaks down food during digestion

DNA: Draw a double helix — The instruction says to draw a double helix. What does a double helix describe?

• The twisted ladder shape of DNA with two strands

• A single straight chain of amino acids

• A circular strand of RNA

• A pair of identical chromosomes

Choose the definition that matches the term dominant.

• any chromosome that is not a sex chromosome

• trait that will show up in an organism's phenotype if one gene is present

• genetic makeup of an organism

• different forms of a gene

• an organism that has two different alleles for a trait

Choose the definition that matches the term phenotype.

• physical characteristics of an organism

• genetic makeup of an organism

• a chart that shows all the possible combinations of alleles that can result from a genetic cross

• trait that will only appear in the phenotype if an organism inherits two of them; covered up by the dominant gene

Choose the definition that matches the term allele.

• different forms of a gene

• an organism that has two identical alleles for a trait

• any chromosome that is not a sex chromosome

• one of the pair of chromosomes that determine the sex of an individual

• physical characteristics of an organism