BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
3rd Edition
ISBN: 9781260670929
Author: Hoefnagels
Publisher: MCG CUSTOM
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Chapter 7, Problem 5MCQ
Summary Introduction
Introduction:
In eukaryotic cells, mRNA (Messenger Ribonucleic Acid) molecule consists of the coding region (exons) that are interrupted by non-coding regions (introns). These coding and non-coding regions of mRNA are transcribed from the tropomyosin. Introns get removed, and exons get joined during RNA splicing and form continuous coding sequence.
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Which of the following statements about genes is incorrect?
Select one:
O a. During fertilization, both the sperm and the ovum contribute genes to the resulting fertilized egg.
b. Genetic differences can result from changes in the DNA called mutations.
O c. Genes correspond to segments of DNA.
d. Under normal circumstances, each chromosome contains precisely one gene.
e. Many genes contain the information needed for cells to synthesize enzymes and other proteins.
1a) Why is it possible for you to study the eye colour gene by extracting cheek cells?
a. Because the nucleus of every cell in the human body contains the same genetic information.
b. Because the cheek cells are located near the cells of the eye and so they are able to exchange DNA.
c. Because all genes in the human body are expressed at all times so it is easy to study them.
d. All of the above are possible explanations.
1b) What is the purpose of heating the sample to 75°C following addition of the 0.2M NaOH solution?
a. To denature the histone proteins that are keeping the DNA tightly coiled.
b. To ensure that all the DNA is removed from the swab in preparation for PCR.
c. To breakdown the cheek cell membrane to release the DNA from the cell.
d. It breaks down the circular DNA down into linear fragments so that they will be easier to visualize.i
Even when a gene is available and its sequence of nucleotides is known, chemical studies of the protein are still required to determine:
a. molecular weight of the unmodified protein.
b. the amino-terminal amino acid.
c. the location of disulfide bonds.
d. the number of amino acids in the protein.
e. whether the protein has the amino acid methionine in its sequence.
Chapter 7 Solutions
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
Ch. 7.1 - Prob. 1MCCh. 7.1 - Prob. 2MCCh. 7.2 - Prob. 1MCCh. 7.2 - Prob. 2MCCh. 7.2 - Prob. 3MCCh. 7.3 - Prob. 1MCCh. 7.3 - Prob. 2MCCh. 7.3 - Prob. 3MCCh. 7.3 - Prob. 4MCCh. 7.3 - Prob. 5MC
Ch. 7.4 - Prob. 1MCCh. 7.4 - Prob. 2MCCh. 7.4 - Prob. 3MCCh. 7.5 - Prob. 1MCCh. 7.5 - Prob. 2MCCh. 7.5 - Prob. 3MCCh. 7.5 - Prob. 4MCCh. 7.5 - Prob. 5MCCh. 7.6 - Prob. 1MCCh. 7.6 - Prob. 2MCCh. 7.6 - Prob. 3MCCh. 7.7 - Prob. 1MCCh. 7.7 - Prob. 2MCCh. 7.7 - Prob. 3MCCh. 7.7 - Prob. 4MCCh. 7.8 - Prob. 1MCCh. 7.8 - Prob. 2MCCh. 7.8 - Prob. 3MCCh. 7.8 - Prob. 4MCCh. 7.8 - Prob. 5MCCh. 7.9 - Prob. 1MCCh. 7.9 - Prob. 2MCCh. 7.10 - Prob. 1MCCh. 7.10 - Prob. 2MCCh. 7 - If one strand of DNA has the sequence ATTGTCC,...Ch. 7 - Transcription copies a _____ to a complementary...Ch. 7 - Prob. 3MCQCh. 7 - Prob. 4MCQCh. 7 - Prob. 5MCQCh. 7 - Prob. 6MCQCh. 7 - At which stage in viral replication does the...Ch. 7 - Prob. 8MCQCh. 7 - Prob. 1WIOCh. 7 - Prob. 2WIOCh. 7 - Prob. 3WIOCh. 7 - Prob. 4WIOCh. 7 - Prob. 5WIOCh. 7 - Prob. 6WIOCh. 7 - Prob. 7WIOCh. 7 - Prob. 8WIOCh. 7 - How many codons are in the mRNA molecule that you...Ch. 7 - Prob. 10WIOCh. 7 - Prob. 11WIOCh. 7 - Prob. 12WIOCh. 7 - Prob. 13WIOCh. 7 - Prob. 14WIOCh. 7 - Prob. 15WIOCh. 7 - Prob. 16WIOCh. 7 - Prob. 17WIOCh. 7 - Prob. 18WIOCh. 7 - Prob. 19WIOCh. 7 - Prob. 20WIOCh. 7 - Prob. 21WIOCh. 7 - Prob. 1SLCh. 7 - Prob. 1PITCh. 7 - Where do promoters, terminators, stop codons,...Ch. 7 - Prob. 3PITCh. 7 - Review the Survey the Landscape figure in the...
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- a. Which gene is mutated in individuals with sickle-cell anemia? b. What are the major symptoms of this disorder? c. What was the first published scientific description of sickle-cell anemia? d. Describe two other features of this disorder that you learned from the OMIM database and state where in the database you found this informationarrow_forwardGene expression is a term that relates to Select one: A. DNA replication. B. the flow of genetic information from DNA to proteins. C. how genes are passed from parent to offspring. D. the unique set of genes in an individual.arrow_forwardA researcher has identified a mutant strain of yeast whose histones are unable to be acetylated. Which of the following is the MOST reasonable prediction for how the phenotype of this mutant yeast will differ from the phenotype of yeast cells with acetylated histones? A. The mutant will grow more rapidly. B. The mutant will grow much more slowly. C. The mutant will show decreased levels of gene expression. D. The mutant will show increased levels of gene expression.arrow_forward
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- A protein is normally secreted from the cell. A team of scientists attempts to redirect this protein to the inside of the nucleus by mutating the sequence of the gene. Unfortunately, after this mutation, the protein is no longer secreted, but it is now localized to the cytosol and not the nucleus. Briefly answer the two questions below: Identify the sequence that was mutated by the scientists and explain your reasoning. a. b. What additional mutation must be made by the scientists to redirect this protein to the nucleus? Explain your reasoning.arrow_forwardHow would each of the following types of mutations affect proteinfunction or the amount of functional protein that is expressed froma gene?A. Nonsense mutationB. Missense mutationC. Up promoter mutationD. Mutation that affects splicingarrow_forwardA genetic researcher notices that individuals with a particular genetic disease have a shortened version of key protein involved in the diseased biochemical pathway. Which of the following mutations is most likely to result in the premature termination of protein synthesis? A. The disease is caused by a silent mutation. B. The disease is caused by a frameshift mutation. C. The disease is caused by a missense mutation. D. The disease is caused by a nonsense mutation.arrow_forward
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