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WorksheetsDNA Replication & Karyotypes
Total questions: 15
Worksheet time: 14mins
Which part of the nucleotide provides the "code" for biological information found in DNA?
deoxyribose sugar
ribose sugar
nitrogen base
phosphate group
Which pairs of nitrogen bases are correctly matched?
adenine w/ cytosine
adenine w/ thymine
cytosine w/ thymine
guanine w/ adenine
If the nitrogenous bases in DNA were connected to each other by strong covalent bonds, how would DNA replication be affected?
The process would require less energy to break and re-form the bonds.
The process would take longer because the bases would separate in only one place.
The bases would not come apart easily, making it difficult to read the sequence.
The bases would not fit around the histones, creating longer chromosomes.
A student compared DNA replication to making a photocopy of a document. Which statement best describes her analogy?
Both create a mirror image of the original, but in DNA replication the original is consumed to create the copies.
Both result in an exact copy being created, but in photocopying the original is broken down by the process.
Both result in an exact copy being made, but in DNA replication one-half of the original becomes part of the copy.
Both create a mirror image of the original, but in photocopying multiple copies can be created at one time.
What is the relationship between proteins and nucleic acids?
Nucleic acids encode and transmit genetic information which is used to make proteins.
Proteins are produced by the mitochondria and made up of nucleic acids.
Proteins compose the nucleic acids that store genetic information.
Nucleic acids are the basic units that compose proteins in the cell.
The sequence of nitrogen bases in a strand of DNA is listed below. What is the sequence of the complementary strand?
AGT CCG
TGA CCG
GAC TTA
CTG AAT
TCA GGC
What is the significance of DNA replication during the S Phase of the cell cycle?
It allows the daughter cells to have DNA that differs from the parental DNA.
It allows daughter cells to have an exact copy of the parental DNA.
It allows daughter cells to grow in size before they can enter cell division.
It allows daughter cells to produce cell organelles needed for life processes.
At the nucleotide level, approximately 40% of the human genome is aligned to the mouse genome, making the mouse a good organism to use in the development of drugs that target the proteins made by abnormal genes that cause certain cancers.
Which statement best describes the relationship between the human and mouse genomes?
Both genomes consist of the same four nitrogen bases in the DNA (A, U, C, & G), but it is the varying sequence of the bases that accounts for the differences.
Both genomes consist of the same four nitrogen bases in the DNA (A, T, C, & G), but it is the varying sequence of the bases that accounts for the differences.
Both genomes consist of the same sequence of nitrogen bases in the DNA, but the human genome contains thymine while the mouse genome contains uracil.
Both genomes consist of the same sequence of nitrogen bases in the DNA, but the human genome contains uracil while the mouse genome contains thymine.
A karyotype is a visual representation of an individual's chromosomes.
What is the best description of the individual represented by this karyotype?
A female who has experienced a mutation in which a gene segment was translocated to a new chromosome.
A female who has experienced a deletion mutation of several base pairs from a chromosome.
A male who has experienced a mutation in which extra base pairs were added to a chromosome.
A male who has experienced a non-disjunction mutation of one or more chromosomes.
A couple had their baby tested for Down syndrome. Based on the karyotype, what interpretation(s) can the geneticist make?
(Check all that apply.)
The baby does not have Down syndrome.
The baby has Down syndrome.
The baby's karyotype is normal.
The baby has another genetic disorder.
A geneticist studies the genome of a person to determine the risk of passing down the chromosomal abnormality to a future generation. The karyotype of the person is shown.
The researcher puts a box around the set of chromosomes that show an abnormality. What is the abnormality in the karyotype?
It is missing an X chromosome.
It has an extra X chromosome.
It is missing a Y chromosome.
It has an incomplete Y chromosome.
Which of the following chromosomes are considered "autosomal" chromosomes?
(Check all that apply.)
X
22
Y
3
During Replication, which enzyme is responsible for creating new strands of DNA by joining complementary nucleotides together with hydrogen bonds?
Helicase
DNA Polymerase
Ligase
Amylase
Which of the following terms are accurate descriptions of the *structure* of DNA?
(Check all that apply.)
double helix
complementary strands
parallel strands
antiparallel strands
During DNA replication, which enzyme is responsible for creating the covalent bonds that "glue" together the sugar-phosphate backbone of the newly created DNA strands?
Helicase
DNA polymerase
Ligase
Amylase
