3. The average molecular weight of human proteins is about 50,000 daltons. A few proteins are much larger, such as a muscle cell protein called titin, which has a molecular weight of 3,000,000 daltons. B) If the nucleotides in the coding portion of the mRNA constitute 5% of the total nucleotides that are transcribed, how long will it take a muscle cell to transcribe a gene for an average protein versus the titin gene. Assume that the transcription rate is 50 nucleotides per second.

3. The average molecular weight of human proteins is about 50,000 daltons. A few proteins are much larger, such as a muscle cell protein called titin, which has a molecular weight of 3,000,000 daltons. B) If the nucleotides in the coding portion of the mRNA constitute 5% of the total nucleotides that are transcribed, how long will it take a muscle cell to transcribe a gene for an average protein versus the titin gene. Assume that the transcription rate is 50 nucleotides per second.

Name: 3. The average molecular weight of human proteins is about 50,000 dal
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Description: 3. The average molecular weight of human proteins is about 50,000 daltons. A few proteins are muchlarger, such as a muscle cell protein called titin, which has a molecular weight of 3,000,000daltons.B) If the nucleotides in the coding portion of the

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter15: From Dna To Protein

Section: Chapter Questions

Problem 12TYK: Discuss Concepts The normal form of a gene contains the nucleotide sequence: When this gene is...

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1. A region of DNA in a particular cell synthesizes a segment of RNA that is 174 bases long and in the form of a large palindrome. The RNA is transported to the cytoplasm and folds into a hairpin loop of double stranded RNA. In the cytoplasm, the hairpin loop is recognized by a double-stranded RNA cutting enzyme (dicer) and is cut into 21 BP lengths. When these 21 BP double stranded segments are combined with protein, they function by: Answer choices destroying specific mRNAs priming the synthesis of DNA sequences adding DNA to the chromosome ends (telomeres) acting as decoys for RNA degrading enzymes thus protecting the mRNAs present splicing the introns out of messenger RNA 2. The following are genotypes of merozygotes of E. coli with various combinations of lac operon mutations. Determine the phenotype with respect to beta-galactosidase (z), permease (y), and trans-acetylase (a) of each combination as U = uninducible, I = inducible, and C = constitutive. Choose from…
1. Given the following three mRNA sequences, which 2 sequences code for the same protein?#1 AGU UUA GCA ACG AGA UCA#2 UCG CUA GCG ACC AGU UCA#3 AGC CUC GCC ACU CGU AGU 2. Look at the following sequence: THE FAT CAT ATE THE RAT. Delete the first H and regroup the letters in groups of three- write out the new groups of three. Does the sentence still make sense? What type of mutation is this an example of?
1. Given the DNA sequence below: 5’-ACATGTGTACAGGCTTTGTCTGAATGGCTT-3’ 3’-TGTACACATGTCCGAAACAGACTTACCGAA-5’ Translate the mRNA. (Using the 3-letter code for amino acids, write the primary structure of the peptide that will be produced.) 2. Given the DNA sequence below: 5’-ACATGTGTACAGGCTTTGTCTGAATGGCTT-3’ 3’-TGTACACATGTCCGAAACAGACTTACCGAA-5’ Translate the mRNA. (Using the 3-letter code for amino acids, write the primary structure of the peptide that will be produced.)
1.) if the B chain of human hemoglobin is 146 amino acids in length, calculate the minimum # of nucleotide base pairs needed to code for B-globin? 1a.) How many mRNA codons does this correspond to?
1. Which of the following initially comes directly in contact with the mRNA during translation? a. 60s + 40s b. 50s + 30s c. 40s + 30s d. 60s + 50s 2. Which of the following properties of DNA confers to the presence of 5' phosphate and 3' hydroxyl terminal? a. Double helix b. Polarity c. Complementary base pairing d. Resistance to alkali hydrolysis 3. Which of the following are constant throughout the entire nucleic acid structure? a. Sugar and Phosphate b. A-T + G-C c. A-U + G-C d. Deoxyribose and Ribose
1.List three different mRNA sequences that could encode the amino acid sequence histidyl-alanyl-arginyl-seryl-leucyl-valyl-cysteine.
6a) Transcribe the following DNA sequence into codons. TACGCGACATTACATGAATCGTTTGGAGATTAGCCCTATTTCTCTAAGAACACGACTb) Excise(cut out) codons numbered 5, 6, and 7. Leave the remaining codons. c) Now translate the sequence . d) Explain how many amino acids are now in your polypeptide? e) What would happen to your polypeptide if either of your cysteine amino acids near the start or end of thepolypeptide were translated incorrectly. f) Based on your final polypeptide can you make the original DNA strand by doing reverse translation andtranscription? g) Explain if your polypeptide similar to your template strand or the complementary strand?
4. A mini mRNA has the sequence 5’-UUUGAAAUAUGAUUGAUAUUUAUAUAUGA-3. a) Using the genetic code, provide the amino acids specified by the mini mRNA. b) Label the two ends of the short peptide.
7. A segment of a DNA strand consists of ...GCTTAGACCTGA.... (a) Identify the expected nucleotide order in the complementary mRNA (b) Identify the sequence of amino acids coded for by this segment of DNA. (c) Describe the bond that forms during translation to link amino acids together. Identify the functional groups that react and the atoms involved.
1. If the gene above is transcribed into a functional mRNA, a.) how many codons will be carried by the functional mRNA? b.) what is the sequence of the 25th codon? c.) what is the sequence of the stop codon? 2. If the mRNA transcribed for this gene will be translated into a functional protein, a.) how many amino acids will be used to build the polypeptide chain? b.) what is the amino acid coded by the 25th codon? c.) what is the amino acid coded by the last codon? 3. If the above gene is one of the three structural genes of the lac operon that codes for the protein/ enzyme responsible for breaking lactose into two molecules of simple sugars, a.) what triggers the activation of this gene? b.) what triggers the inactivation of this gene? c.) what substance is attached to the operator region of the operon in the absence of activator? d.) what gene is responsible for the synthesis of the substance used to attach in the operator region in the absence of activator? e.) what…
1. what will be the mRNA complimentary strand of a DNA sequence AATCGGCTGGGATTA? a. UUAGCCGACCCUAAU b. AAUCGGCUGGGAUUA c. TTAGCCGACCCTAAT d. UUTCGGCTGGGUTTU 2. what will be the amino acid sequence of DNA with a sequence AATCGGCTGGGATTA? a. leucine - alanine - aspartic acid - serine - aspagarine b. leucine - threonine - aspartic acid - serine - aspagarine c. leucine - alanine - aspartic acid - proline - aspagarine d. tyrosine - alanine - aspartic acid - proline - aspartic acid 3. what type of points mutation happened if the mutated DNA sequence is TTA-CAG-CAG-GGT-GGC? a. addition b. deletion c. insertion d. subtitution 4. if the first nitrogenous base "T" will be replaced by "G" ; what will be the resulting amino acid for the first codon? a. isoleucine b. leucine c. tyrosine d. trytophan 5. what type of point mutation happened if the mutated DNA sequence is TTS-CGC-AGG-GTG-GC? a. addition b. deletion c. insertion d. substitution
1. Considering the following nucleotide sequence in an mRNA molecule: 5’ AUG UUA CGU AAU GCU GUC GAA UCU AUU UGC UUU ACA UAA 3' a) Write the sequence of the DNA template (antisense) strand from which the mRNA was synthesized. b) Write the sequence of the DNA coding (sense or informational) strand complementary to the template strand. c) Write the sequence of tRNA anticodon that corresponds to the given mRNA molecule. d) Write the amino acid sequence of the peptide synthesized from the given mRNA nucleotide sequence. e) Draw the structure of the pertide fragment made up of the first five (5) amino acids in the given polypeptide.