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WorksheetsExploring the Structure of DNA
Total questions: 25
Worksheet time: 29mins
What is the basic structural unit of DNA?
Amino acid
Nucleotide
Protein
Lipid
Which of the following components is NOT part of a nucleotide of DNA?
Phosphate group
Ribose sugar
Nitrogenous base
Deoxyribose sugar
Describe the shape of the DNA molecule.
Single helix
Double helix
Triple helix
Linear strand
Which nitrogenous base pairs with adenine in DNA?
Cytosine
Guanine
Thymine
Uracil
Explain why the double helix structure of DNA is important for its function.
It allows DNA to be easily replicated.
It makes DNA more stable.
It enables DNA to store genetic information efficiently.
All of the above
Identify the sugar component found in the backbone of DNA.
Ribose
Glucose
Deoxyribose
Fructose
How do the base pairing rules contribute to the DNA replication process?
They ensure that each new DNA molecule is identical to the original.
They allow for the formation of RNA.
They prevent mutations from occurring.
They help in protein synthesis.
Which of the following statements best describes the function of DNA?
DNA provides energy for cellular processes.
DNA stores genetic information.
DNA transports oxygen in the blood.
DNA catalyzes biochemical reactions.
Which of the following pairs of nitrogenous bases are correctly matched according to the base pairing rules?
Adenine and Guanine
Cytosine and Thymine
Adenine and Thymine
Guanine and Thymine
What role do hydrogen bonds play in the structure of DNA?
They connect the sugar and phosphate groups.
They hold the two strands of the double helix together.
They form the backbone of the DNA molecule.
They link the nucleotides together in a single strand.
Which of the following is a function of DNA in cells?
To provide structural support to the cell
To store and transmit genetic information
To catalyze chemical reactions
To transport molecules across the cell membrane
Using the labels, identify the parts of a DNA molecule.
Base pair
Nitrogen Base
Nucleotide
Deoxyribose
Hydrogen bond
Phosphate
Which arrow is pointing to the sugar?
Phosphate
Helps create the backbone of DNA
5 Carbon sugar
Connected to Phosphate and Nitrogen base
Nitrogen base
Creates "rungs" of DNA, can be adenine, thymine, cytosine or guanine
Hydrogen bond
Connects the two sides of DNA to each other
The image shown
Nucleotide
The complementary base pair to T (thymine) is (a) . The complementary base pair to G (guanine) is (b) .
Primary functions of DNA are (mark all that apply)
Transmit information on heredity from one generation to the next
Control cellular respiration
Regulate homeostasis
Provide a blueprint for making proteins
Which of the following is not a function of DNA?
Stores genetic information
Codes for proteins
Helps determines your traits
Tells your body when to move
DNA is used to make mRNA, while they are similar in base pairing the one exception is that when you have an adenine (A) it creates a what on the mRNA?
What are the four nitrogenous bases found in DNA?
Adenine, Thymine, Cytosine, Guanine
Adenine, Uracil, Cytosine, Guanine
Thymine, Uracil, Cytosine, Guanine
Adenine, Thymine, Cytosine, Uracil
Label the nucleotide
Phosphate
Sugar
Nitrogenous base
Based on these results, whose blood was found in the blood stain at the crime scene?
Bob
Sue
John
Lisa
Which suspect's DNA was found at the crime scene?
Suspect #1
Suspect #2
Suspect #3
The parents of a new baby believe they brought the wrong child home from the hospital. Gel electrophoresis was performed using DNA samples from the parents and the child. A section of the gel
electrophoresis results is shown below. Which conclusion is valid based on the gel electrophoresis results?
They have the correct child, because her genetic information is identical to that of the father.
They have the wrong child, because her genetic information does not match that of either parent.
They have the correct child, because her genetic information matches the genetic information from both parents.
They have the wrong child, because her genetic information matches only that of the mother.
A hospital wants to identify the parents of a baby. Based on the DNA fingerprints, which couple is most likely the parents of the baby?
Couple W
Couple X
Couple Y
Couple Z
DNA fingerprinting works because
Most genes are dominant
All organisms contain RNA
The most important genes are different among most people
No two people, except identical twins, have exactly the same DNA
