An alpha helix is a: O A. secondary structure found in proteins. O B. right-handed twist found in double-stranded DNA. O C. globular structure found in proteins. O D. post-translational modification of certain proteins. O E. helical region found in functional tRNAs.

An alpha helix is a: O A. secondary structure found in proteins. O B. right-handed twist found in double-stranded DNA. O C. globular structure found in proteins. O D. post-translational modification of certain proteins. O E. helical region found in functional tRNAs.

Name: An alpha helix is a:O A. secondary structure found in proteins.O B. r
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Description: An alpha helix is a:O A. secondary structure found in proteins.O B. right-handed twist found in double-stranded DNA.O C. globular structure found in proteins.O D. post-translational modification of certain proteins.O E. helical region found in funct

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter7: Gene Expression And Control

Section: Chapter Questions

Problem 1CT

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Concept explainers

Gene Interactions

When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.

Gene Expression

Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.

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Question

An alpha helix is a:
O A. secondary structure found in proteins.
O B. right-handed twist found in double-stranded DNA.
O C. globular structure found in proteins.
O D. post-translational modification of certain proteins.
O E. helical region found in functional tRNAS.

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A small section of a gene for a protein has the following nucleotide sequence:CTG GGA TCC TAA GGTWhich of the following mutations would cause a nonsense mutation in the sequence shown above? Select one: a. Replacement of second adenine base with a cytosine base b. Insertion of guanine base after the first thymine base c. Insertion of guanine base after the first adenine base d. Replacement of second cytosine base with a adenine base
A small section of a gene for a protein has the following nucleotide sequence: TAT AGG GAC CTA TGT Which of the following mutations would cause a missense mutation in the sequence shown above? a. Replacement of first cytosine base with guanine base b. Replacement of final thymine base with guanine base c. Replacement of second guanine base with cytosine base d. Replacement of first thymine base with adenine base
A small section of a gene for a protein has the following nucleotide sequence: GCT AGC AAC CGC GGGWhich of the following mutations would cause a nonsense mutation in the sequence shown above? Select one: a. Insertion of uracil base after the first thymine base b. Replacement of second adenine base with a thymine base c. Insertion of uracil base after the second cytosine base d. Replacement of second guanine base with a thymine base
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In your own words
Which of the following statements are accurate descriptions of the genetic code? MARK ALL THAT APPLY Select one or more: a. The genetic code is made up of triplet nucleotides that specify an amino acid. b. The genetic code is unambiguous because codons only specific a single amino acid. C. The genetic code is read in an overlapping manner. d. The genetic code is redundant because a single codon can specify more than one amino acid. e. Some amino acids are encoded by more than one codon. f. All codons of the genetic code specify amino acids.
A small section of a gene for a protein has the following nucleotide sequence: CTA TCC CCT ACG TCA Which of the following mutations would cause a silent mutation in the sequence shown above? a. Replacement of first thymine base with adenine base b. Replacement of second thymine base with guanine base c. Replacement of first cytosine base with guanine base d. Replacement of second adenine base with thymine base
Degeneracy of the genetic code denotes the existence of which of the following? A. codons that can wobble at the 5' position B. multiple codons for a single amino acid C. codons consisting of only two bases D. base triplets that do not code for any amino acid E. codons that are not overlapping
Consider the following portion of mRNA produced by the normal order of DNA nucleotides: 5’ – CUU AAA CCA GUU – 3’ a. What is the template DNA sequence that was used to synthesize this portion of mRNA? b. What is the amino acid order produced from this mRNA? c. Write the amino acid sequence if a mutation changes CUU to CAU. Is this likely to affect protein function?
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