Every cell contains all of the DNA for an organism. What controls when and how specific genes are expressed? Genes are not controlled, all genes are expressed all the time Gene expression is controlled by sequences in the DNA Gene expression is controlled by proteins Gene expression can be controlled by proteins and sequences in the DNA O 000

Every cell contains all of the DNA for an organism. What controls when and how specific genes are expressed? Genes are not controlled, all genes are expressed all the time Gene expression is controlled by sequences in the DNA Gene expression is controlled by proteins Gene expression can be controlled by proteins and sequences in the DNA O 000

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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which is the following is not a step in the process of de novo gene birth? o translated peptides provide some benefit to the orhganism, leading to selection for increased expression. o the open reading frame picks up sequences that enable recognition of its transcribed mRNA by the ribosome. o an open reading frame is created through mutations. o the gene copy number changes as a result of gene duplication to make paralogs.
1. Hyperproliferation or cell cycle arrest; cell cycle arrest or accumulation of dna; hyperproliferation or growth stress increase or decrease
Choose the statement that correctly characterizes regulated and/or constitutive gene expression. Regulated expression refers to gene expression that is either on or off, depending on the physiological or metabolic status of the cell. Constitutive expression refers to gene expression that is either on or off, depending on the physiological or metabolic status of the cell. Constitutive expression refers to gene expression that is always repressed in response to the absence of required nutrients or other metabolic molecules. Regulated expression refers to gene expression that is always on, regardless of the metabolic or physiological conditions in the cell. Regulated and constitutive expression are terms used to describe gene expression in prokaryotes only.
You have 2 genes side by side on a chromosome, gene A and gene B. In your cell your RNASE enzyme that degrade MRNAS starting at their poly A tail is no longer functional. Choose the description that best describes the end result of this mutation. O a No MRNA can be degraded and resulting proteins will forever be made in the cell O b. There is no etfect on the cell O c. Gene A MRNA cannot be degraded and resulting Protein A will forever be made in the cell Od. Gene B MRNA cannot be degraded and resulting Protein B will forever be made in the cll
How can you get more than one protein from one gene? Alternative splicing/multiple mRNAs One MRNA/frameshift/multiple proteins Polyprotein cut into multiple proteins O All the above
Which of the following mutations would not convert a proto-oncogene into an oncogene? A translocation that places the gene at a new locus where gene expression is increased. A mutation in the coding region that makes the protein resisitant to degradation. Gene duplication. A mutation in the coding region that makes the protein hyperactive. A deletion of an enhancer that lies 3’ to the coding region.
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Refer to the following illustration to answer the question. ORGANISM A embryonic stage 1 gene 1 gene 2 III regulatory DNA sequences transcription regulator embryonic stage 2 gene 1 TIME gene 2 III gene 3 gene 3 ITT O all of the above ΔΔ 444 RELATED ORGANISM B embryonic stage 1 gene 1 embryonic stage 2 gene 1 gene 2 the presence of some genes the location of a gene regulatory DNA O the differential expression of gene 1 TIME According to this hypothetical case, the difference between the two organisms is: gene 2 the timing of gene expression of a transcription regulator gene 3 gene 3 I
At which stage of the Central Dogma does MOST of the regulation of gene expression occur? O Post-transcriptional processing of the pre-MRNA O Post-translational processing of the polypeptide chain Transcription of pre-mRN O Translation of protein
Which method is most likely used to regulate the expression of a gene that is active during embryonic development but then silenced for the rest of the life of the individual? Histone modification Post translational modifications Alternative Splicing Controlling RNA export from the nucleus
Different cell types, for example a muscle or a blood cell in the same organism retain O only a small fraction of their original set of genes, the ones they will need specifically for functioning, but can regenerate these lost genes as needed. O a complete set of all the same genes, but most of the genes have been permanently altered so that they cannot be transcribed into mRNA transcripts. O a complete set of their genes, and retain the ability to express those genes under certain circumstances into MRNA. O the ability to change their DNA to add regulatory elements that can turn off or on genes.