Homework Answers
Q.1
Answer: Prokaryotic mRNA goes through multiple modifications before translation.
Explanation:
- Only eukaryotic mRNA goes through multiple modifications before translation, not prokaryotic mRNA. The statement mentioned above is FALSE.
- Eukaryotic pre-mRNA undergo post-transcriptional modification before the translation.
Q.2
Answer: A nucleotide changed during the replication, the new codon codes for a polar amino acid instead of a non-polar one.
Explanation:
- All the genes in the Krebs cycle are vital for human survival. Deletion in the promoter region on one of the Krebs cycle gene would be fatal for us.
- When the reading frame changes then the entire protein sequence itself will change. This causes the protein to be non-functional completely.
- When there is an early stop codon in the gene, this would lead to the production of a truncated protein.
- But, when there is a change in the type of single amino acid, it may not have a drastic effect on the protein structure or function.
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The main differences in gene expression between prokaryotes and eukaryotes result from the presence of a...
In humans, there are about 200 different types of cells. Why are your liver cells different...
In humans, there are about 200 different types of cells. Why are your liver cells different from skin cells, or neurons, or muscle cells? During development, each cell accumulates different mutations changing their DNA They produce the same proteins but some of those proteins are denatured in each cell They have different DNA and thus, each cell produces different proteins They produce the same kind of proteins but not all proteins are active in each cell They have the same...
choose the correct answer 26. In eukaryotes, but not in prokaryotes, ribosomes find the start site...
choose the correct answer
26. In eukaryotes, but not in prokaryotes, ribosomes find the start site of translation by? a. binding directly to a ribosome-binding site preceding the initiation codon b. scanning along the mRNA from the 5' end c. recognizing an AUG codon as the start of translation. d. binding an initiator tRNA 27. Which of the following statements about prokaryotic mRNA molecules is FALSE? a. A single prokaryotic mRNA molecule can be translated into several proteins b. Ribosomes...
3. Prokaryotic and eukaryotic gene expression compared. Below is an incomplete table of prokaryotic and eukaryotic...
3. Prokaryotic and eukaryotic gene expression compared. Below is an incomplete table of prokaryotic and eukaryotic gene expression in comparison. Fill in the blank using PPT slides, notes and the textbook. Prokaryotic gene expression Eukaryotic gene expression Overview Steps Transcription and translation Yes Transcription and translation coupled? Gene structure No introns Epigenetic modification (chromosome remodeling) transcription, translation, RNA processing, protein processing Transcription in the nucleus and translation in the cytoplasm Interrupted gene with exons and introns RNAPI, II, III Which...
1) In both eukaryotes and prokaryotes, gene expression can be regulated at the level of ____....
1) In both eukaryotes and prokaryotes, gene expression can be regulated at the level of ____. Group of answer choices a)transcription b)translation c)mRNA splicing d)All of the above e)transcription and translation only 2)Which of the following is the least likely mechanism to convert a proto-oncogene to an oncogene? Group of answer choices a)gene amplification b)point mutation within the gene c)point mutation in the promoter or enhancer regions d)histone acetylation e)chromosome translocation
Q1)Which of the following is not involved in control of gene expression in eukaryotes? A. Change...
Q1)Which of the following is not involved in control of gene expression in eukaryotes? A. Change to DNA sequence. B. Alternative splicing. C. Export of mRNA from the nucleus. D. Transcriptional repression. E. Destruction of mRNA Q2) Trans-acting regulators of gene expression include? A. promoters. B. histone deacetylases C. introns D. silencers E. the TATA box. Q3) Gene regulation in eukaryotes often involves which of the following, which are not also used by prokaryotes? A.RNA polymerase B.Transcription factors C.Histone modification...
Question 14 Which of the following is a feature common to BOTH prokaryotes and eukaryotes? The...
Question 14 Which of the following is a feature common to BOTH prokaryotes and eukaryotes? The use of nucleosomes to condense DNA in the nucleus. The ability to translate an RNA before its transcription is complete. The ability to have multiple ribosomes on a single RNA for more efficient translation. The ability to start transcription at a 5'AUG sequence. o Question 15 A particular prokaryotic promoter contains only the region from-10 to-35. Which of the following is true? The RNA...
Match each term associated with genes and control of gene expression with the appropriate description. A...
Match each term associated with genes and control of gene expression with the appropriate description. A transcriptional unit" that consists of promoter multiple genes under the control of a single regulatory element. A transcriptional regulatory protein (prokaryotic or eukaryotic) which works by turning on or increasing gene transcription. activator The region of a gene to which RNA polymerase binds. Enhancer A transcriptional regulatory protein prokaryotic or eukaryotic) which works by turning off or decreasing gene transcription. repressor A molecule that...
11. A gene is best defined as a. A segment of DNA b. Three nucleotides that...
11. A gene is best defined as a. A segment of DNA b. Three nucleotides that code for an amino acid. C. A sequence of nucleotides in DNA that codes for a functional product. d. A sequence of nucleotides in RNA that codes for a functional product. e. A transcribed unit of DNA. 12. Which of the following statements is false? a. DNA polymerase joins nucleotides in one direction only. b. The leading strand of DNA is made continuously c....
Which of the following mechanisms to regulate gene expression are observed in eukaryotes, but are not...
Which of the following mechanisms to regulate gene expression are observed in eukaryotes, but are not generally observed in prokaryotes? Choose all that apply. Genes are grouped into operons, which allows transcriptional regulation to turn them all on together. RNA silencing selectively targets mRNA and destroys it to prevent further translation. Proteins can be activated or deactivated as a form of post-translational regulation. Epigenetic regulation can open or condense sectiosn of a chromosome, regulating which genes are transcribed. Regulatory proteins...
1) The universal genetic code is used to translate aminoacids from a. codons in the DNA...
1) The universal genetic code is used to translate aminoacids from a. codons in the DNA b. codons in the mRNA c. codons in tRNA d. codons in rRNA 2) In RNA, introns are: a. nucleotide sections that do not code for proteins and are not removed before translation b. nucleotide sections that code for proteins and must be removed before transcription c. nucleotide sections that do not code for proteins and must be removed before translation d. nucleotide sections...
In humans, there are about 200 different types of cells. Why are your liver cells different from skin cells, or neurons, or muscle cells? During development, each cell accumulates different mutations changing their DNA They produce the same proteins but some of those proteins are denatured in each cell They have different DNA and thus, each cell produces different proteins They produce the same kind of proteins but not all proteins are active in each cell They have the same...
choose the correct answer
26. In eukaryotes, but not in prokaryotes, ribosomes find the start site of translation by? a. binding directly to a ribosome-binding site preceding the initiation codon b. scanning along the mRNA from the 5' end c. recognizing an AUG codon as the start of translation. d. binding an initiator tRNA 27. Which of the following statements about prokaryotic mRNA molecules is FALSE? a. A single prokaryotic mRNA molecule can be translated into several proteins b. Ribosomes...
3. Prokaryotic and eukaryotic gene expression compared. Below is an incomplete table of prokaryotic and eukaryotic gene expression in comparison. Fill in the blank using PPT slides, notes and the textbook. Prokaryotic gene expression Eukaryotic gene expression Overview Steps Transcription and translation Yes Transcription and translation coupled? Gene structure No introns Epigenetic modification (chromosome remodeling) transcription, translation, RNA processing, protein processing Transcription in the nucleus and translation in the cytoplasm Interrupted gene with exons and introns RNAPI, II, III Which...
Question 14 Which of the following is a feature common to BOTH prokaryotes and eukaryotes? The use of nucleosomes to condense DNA in the nucleus. The ability to translate an RNA before its transcription is complete. The ability to have multiple ribosomes on a single RNA for more efficient translation. The ability to start transcription at a 5'AUG sequence. o Question 15 A particular prokaryotic promoter contains only the region from-10 to-35. Which of the following is true? The RNA...
Match each term associated with genes and control of gene expression with the appropriate description. A transcriptional unit" that consists of promoter multiple genes under the control of a single regulatory element. A transcriptional regulatory protein (prokaryotic or eukaryotic) which works by turning on or increasing gene transcription. activator The region of a gene to which RNA polymerase binds. Enhancer A transcriptional regulatory protein prokaryotic or eukaryotic) which works by turning off or decreasing gene transcription. repressor A molecule that...
11. A gene is best defined as a. A segment of DNA b. Three nucleotides that code for an amino acid. C. A sequence of nucleotides in DNA that codes for a functional product. d. A sequence of nucleotides in RNA that codes for a functional product. e. A transcribed unit of DNA. 12. Which of the following statements is false? a. DNA polymerase joins nucleotides in one direction only. b. The leading strand of DNA is made continuously c....
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