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Description: The information in DNA is used by cells to produce proteins that perform various functions in cells. The process of gene expression involves the transcription of a mRNA molecule that is translated by ribosomes into a strand of amino acids.1. Use your

Science

Biology

The information in DNA is used by cells to produce proteins that perform various functions in cells. The process of gene expression involves the transcription of a mRNA molecule that is translated

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter9: Gene Expression And Gene Regulation

Section: Chapter Questions

Problem 4QP: If the genetic code uses triplets, how many different amino acids can be coded by a repeating RNA...

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Each of the following statements about protein synthesis is false.Correct each to make a true statement. a. In a gene, each nucleotide specifies one amino acid in a protein sequence. b. A transcription factor must bind to the promoter region of a gene before the enzyme DNA synthetase is able to bind and begin transcription. c. The enzyme RNA polymerase builds a strand of transfer RNA, whose codons are complementary to DNA’s triplets. d. Proteins destined for secretion from the cell enter the nucleus after translation, to be folded and modified. e. During translation, amino acids are delivered by the messenger RNA transcrip
Number the following steps of protein synthesis in order in which they occur, starting with 1 and ending with 9. a. ____ the stop codon is reached, and the polypeptide is released b.____ the small ribosomal subunit finds the start codon, and the large ribosomal subunit joins. c.____ the end of the gene is reached, and the pre-mRNA is released and then edited. d. ____ The transcription factor bonds the promoter. e. ____ the protein is folded and modified to become functional. f. ____ RNA polymerase builds the mRNA transcript. g. ____ mRNA and initiator tRNA bind the small ribosomal subunit. h. ____ new tRNAs are brought into the A site successively, and the peptide chain of the tRNA in the P site is joined to the amino acid of the tRNA in the A site. i. ____ mRNA exits the nucleus via a nuclear pore.
The information in DNA is used by cells to produce proteins that perform various functions in cells. The process of gene expression involves the transcription of an mRNA molecule that is translated by ribosomes into a strand of amino acids. Use your DNA strand to construct a part of a messenger RNA molecule. DNA A G T A C C G G G C A A A C T G C A T T G T G mRNA
Number the following steps of protein synthesis in the order in which they occur, starting with 1 and ending with 9.a. _____ The stop codon is reached, and the polypeptide is released.b. _____ The small ribosomal subunit finds the start codon, and the large ribosomal subunit joins.c. _____ The end of the gene is reached, and the pre-mRNA is released and then edited.d. _____ The transcription factor binds the promoter.e. _____ The protein is folded and modified to become functional.f. _____ RNA polymerase builds the mRNA transcript.g. _____ mRNA and initiator tRNA bind the small ribosomal subunit.h. _____ New tRNA molecules are brought into the A site successively, and the peptide chain of the tRNA in the P site is joined to the amino acid of the tRNA in the A site.i. _____ mRNA exits the nucleus via a nuclear pore.
Researchers are designing and testing antisense drugs as therapies for a variety of diseases, including cancer, AIDS, diabetes, and muscular dystrophy. The drugs are also being tested to fight infection by deadly viruses such as Ebola. Antisense drugs consist of short RNA strands complementary in sequence to mRNAs that form during the progression of a disease. How do you think these drugs work?
Which of the following is the definition of a gene? A. RNA that delivers amino acids to a ribosome during translation B. A unit of information encoded in the sequence of nucleotide bases in DNA C. The RNA component of ribosomes D. RNA that carries a protein-building message
In protein synthesis, DNA transcription records the genetic message, while ribosomal ______________ interprets the message. ________________ carries the genetic code to the ribosomes to facilitate protein/amino acid synthesis. The genetic message to make a specific amino acid in a protein, is carried by a specific three nucleotide unit on the messenger RNA called a During transcription, the nitrogen base adenine on the DNA bonds with the nitrogen base ______________ on the messenger RNA. The enzyme __________________ unwinds the DNA double helix in DNA transcription.
Gene Expression: Illustrate some steps involved in RNA processing and identify the sequence of amino acids in a polypeptide chain corresponding to the codons in the mRNA. Procedure and Questions: The following segment of DNA codes for a protein. The uppercase letters represent exons. The lowercase letters represent introns. The lower strand is the template strand. 1. Indicate the 3’ and 5’ ends of both strands. G C T A T A A T G G C A a a a t t g G G T C A G G C A a a t c g a C A T A G C T G A C G G g g a t g a G G T T A A C G A T A T T A C C G T t t t a a c C C A G T C C G T t t a g c t G T A T C G A C T G C C c c t a c t C C A A T T 2. Write the pre-mRNA molecule. Indicate the 3’ and 5’ ends. 3. Write the mRNA molecule. Indicate the 3’ and 5’ ends. 4. Write the tRNA anticodons corresponding to the codons in the mRNA. 5. Write the sequence of amino acids in the resulting polypeptide
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A few genes produce regulatory molecules that help the cell assemble proteins. The journey from gene to protein is complex and tightly controlled within each cell. Which of the following statements best describes the role of DNA and RNA in protein synthesis? * A. DNA is the primary genetic material contained within a cell. B. DNA is the long-term storage while RNA is the messenger containing instruction from DNA C. DNA creates protein during protein synthesis & converts it into usable molecules while RNA assembles amino acid into a protein. D. All of the above. Humans and chimpanzees share many common characteristics. How would you explain the similarities of the amino acid sequences that can be found in both organisms? * A. Two groups share a relatively common ancestor B. Humans evolved from chimpanzees C. Two groups belong to the same species D. Chimpanzees evolved from…
Which of the following steps in protein synthesis does not require a direct supply of energy? a. proofreading step by certain aminoacyl-tRNA synthetases b. translocation of mRNA in a ribosome c. linkage of an amino acid to its cognate tRNA d. alignment of a tRNA anticodon with an mRNA codon