Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 12, Problem 4TY
Summary Introduction
Introduction:
The genetic material of all the living organism is the DNA (deoxyribonucleic acid) and RNA (ribonucleic acid). This genetic material contains information which is passed on to the next generation. In prokaryotes, genetic material is found freely in the cell while in eukaryotes the genetic material is enclosed inside the nucleus.
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One strategy for producing a protein in the milk of a cow is toplace the coding sequence of the gene of interest next to a__________ and then inject the gene into a _________.a. lac operon promoter, cow oocyteb. β-lactoglobulin promoter, cow oocytec. lac operon promoter, cow mammary celld. β-lactoglobulin promoter, cow mammary cell
Which of the statements about the attenuator region of the trp operon is TRUE?
Choose an answer below:
It is located upstream of the promoter.
It is located upstream of the operator.
Its transcript contains inverted repeats.
It is located upstream of the structural genes.
c and d, but not a or b
In the lac operon system, lactose is considered the ___________, and when the gene lacI is mutated such that the protein it produces cannot bind to lactose (IS mutation), the lac operon is ________.
Group of answer choices
repressor; never expressed
activator; constitutively expressed
inducer; never expressed
inducer; constitutively expressed
structural gene; never expressed
Chapter 12 Solutions
Principles of Biology
Ch. 12.1 - How does gene regulation underlie the different...Ch. 12.1 - Prob. 1TYKCh. 12.1 - The most common point of gene regulation in...Ch. 12.2 - Which genes are under the control of the lac...Ch. 12.2 - Prob. 2CCCh. 12.2 - Prob. 1BCCh. 12.2 - Prob. 1TYKCh. 12.3 - Prob. 1CCCh. 12.3 - Prob. 1TYKCh. 12.3 - Prob. 2TYK
Ch. 12.4 - Prob. 1CCCh. 12.4 - Prob. 1BCCh. 12.4 - A chromatin-remodeling complex may change the...Ch. 12.4 - Prob. 2TYKCh. 12.5 - What is the biological advantage of alternative...Ch. 12.5 - Prob. 2CCCh. 12.5 - Prob. 1TYKCh. 12.5 - Prob. 2TYKCh. 12 - Genes that are expressed at all times at...Ch. 12 - Prob. 2TYCh. 12 - Transcription factors that bind to DNA and...Ch. 12 - Prob. 4TYCh. 12 - Prob. 5TYCh. 12 - Prob. 6TYCh. 12 - Prob. 7TYCh. 12 - Prob. 8TYCh. 12 - Prob. 9TYCh. 12 - Prob. 10TYCh. 12 - What is the difference between inducible and...Ch. 12 - Transcriptional regulation often involves a...Ch. 12 - PRINCIPLES A principle of biology is that the...Ch. 12 - Discuss the advantages and disadvantages of...Ch. 12 - Prob. 2CBQ
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- A mutation that inactivates the repressor gene of the lac operon results in (a) the continuous transcription of the structural genes (b) no transcription of the structural genes (c) the binding of the repressor to the operator (d) no production of RNA polymerase (e) no difference in the rate of transcriptionarrow_forwardThe promoter and terminator regions of genes are important in: a. coding for amino acids b. gene regulation c. structural support for the gene d. intron removal e. anticodon recognitionarrow_forwardBinding of _______ to _______ in DNA can increase the rate of transcription of specific genes. a. activators; repressors c. repressors; operators b. activators; enhancers d. repressors; enhancersarrow_forward
- Which of the following statements best describes the promoter of a protein-coding gene? A. The promoter is a protein that recruits RNA polymerase. B. The promoter is part of the RNA molecule itself. C. The promoter is a site found on RNA polymerase. D. The promoter contains the AUG start codon. E. The promoter is a nontranscribed region of a gene.arrow_forwardWhich of the following is not a reason that gene transcription is selective (occurs on specific segments of DNA)?Group of answer choices a) in eukaryotes, transcribed mRNA is processed to add a poly-A tail b) sigma factors direct RNA polymerase where to bind the DNA template c) promoters differ from gene to genearrow_forwardAt the beginning of transcription, RNA polymerase binds to the gene ____________; it then adds ribonucleotides that are complementary to the ________________. Group of answer choices Promoter; coding strand Enhancer; coding strand Promoter; template strand Sigma factor; one of the two strands Enhancer; template strandarrow_forward
- Which feature of promoters can be found in both prokaryotes and eukaryotes? a. GC box b. TATA box c. octamer box d. -10 and -35 sequencesarrow_forwardInitiation of transcription A occurs at terminators B occurs only in eukaryotes C occurs in promoters D none of the abovearrow_forwardThe gad operon is controlled by a number of transcription factors that regulate a promoter of approximately 450bp. Which would NOT explain why bacterial promoters are shorter than the typical eukaryotic promoter? a. Bacteria do not have nucleosomes b. Bacteria do not have mediator complex c. Each operon is regulated by only one signal d. All of the above are truearrow_forward
- The lac operon is usually in the ________ position and is activatedby a/an ________ molecule.a. on, repressor b. off, inducer c. on, inducer d. off, repressorarrow_forwardWhat do you call the site of activators that bind to the DNA molecule ? A. enhancer B. operon C. operator D. II E. Iarrow_forwardIn the lac operon, how would gene expression be affected if each one of the following segments was missing? A. lac operon promoter B. Operator site C. lacA genearrow_forward
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