Which of the following statements are true? O Each stop codon also codes for an amino acid O Each codon in MRNA codes for exactly one amino acid O The start codon also codes for an amino acid Each TRNA will base pair with only one codon There are multiple codons possible for nearly all amino acids Each TRNA carries exactly one type of amino acid Each anticodon in tRNA pairs with exactly one codon Each codon in tRNA codes for exactly one amino acid

Which of the following statements are true? O Each stop codon also codes for an amino acid O Each codon in MRNA codes for exactly one amino acid O The start codon also codes for an amino acid Each TRNA will base pair with only one codon There are multiple codons possible for nearly all amino acids Each TRNA carries exactly one type of amino acid Each anticodon in tRNA pairs with exactly one codon Each codon in tRNA codes for exactly one amino acid

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Which of the following mRNA codons could be changed to a stop codon by a single base pair substitution in DNA ? [In other words, if you substitute one of the bases for a diferent one, it will produce a stop codon. Don't overthink this. Just look at the codon as written, and see if changing any one base leads to a stop codon]. 1. UAC (tyrosine) 2. UGG (tryptophan) 3. CGA (arginine) 4. ACU (threonine) A. 1, 2 and 3 B. 1 and 3 C. 2 and 4 D. 4 only E. All of 1, 2, 3 and 4 are correct
The synthesis of a protein requires that the amino acids that constitute the growing polypeptide chain be covalently linked to the amino acid attached to the tRNA at the aminoacyl site of the ribosome. Which of the following catalyses this reaction? Options: the aminoacyl tRNA synthetase eEF2 eEF1-GTP a large ribosomal RNA the initiator tRNA met
A small section of mRNA codons has the following sequence:UGU GGU CAA CCG Some Amino Acids Valine Serine Proline Glycine Arginine Leucine Histidine Cysteine Glutamine The amino acids listed above that are coded by the mRNA codons are Answer, Answer, Answer, and Answer.Record your answer in order from left to right codons.
Which of the following statements best explains why there are many more codons than there are amino acids? Group of answer choices Many codons are now considered "junk" codons The rules for base pairing between the third base of a codon and tRNA are flexible. Some tRNAs have anticodons that recognize four or more different codons. The DNA codes for all 61 tRNAs, but some are then destroyed.
During planetary exploration a new life form is discovered which has a DNA genome containing 6 different bases rather than the familiar four. The life form contains proteins with 25 different amino acids. Codons on Earth comprise three nucleotides; assuming a non-overlapping genetic code that includes initiation and termination codons, how many nucleotides would you predict to constitute a codon in the new life form, assuming all codons to be the same length? Briefly explain your answer
The 3 sites that bind tRNAS on a ribosome are on the A, P and E sites. How many sites can tRNA(s) be on the ribosome at the same time? 1 2 3
ADP ribosylation is one example of post-translational modification of an enzyme. Which statements about the process is true? ADP ribosylation will affect protein folding because of the addition of a large molecule ADP ribose can be added to the amine group of lysine or glutamine The ending of DNA around histones in the nucleus is altered by the ADP -ribosylation of the histone proteins in cancer cells ADP ribosylation requires ADP and the target protein as the substrates in the ADP ribosylation ADP ribosylation of phosphoinositol is an important step in signaling through a G protein-coupled receptor pathway.
If methionine is the first amino acid incorporated into a heptapeptide, what is the sequence of the amino acids encoded for by the following stretch of mRNA? 5'-G-C-A-U-G-G-A-C-C-C-C-G-U-U-A-U- U-A-A-A-C-A-C-3'
Which of the following statements about tRNA molecules is TRUE? Multiple Choice TRNA assumes a double helical shape Every base in a tRNA molecule pairs with another base in the same tRNA strand, leading to its higher levels of structure Bases in the tRNA loops do not pair with any other bases The amino acid is attached to the central loop region of the tRNA molecule All of the answers are correct.
What term is used to describe the sequence on the tRNA that is complementary to mRNA? Complementary sequence Codon Anti-codon Anti-anticodon
UCAAUGGGGUUUAUAGCG… (there are bases after the last G but we don’t know what they are so there may be some ambiguity for the last codon with regards to the amino acid possibilities) if the translation frame had UCA as the first codon: if the translation frame had CAA as the first codon: if the translation frame had AAT as the first codon:
Give the complementary codons, anticodons, and amino acids for the following: - ATG - CCA-AGG-GCT - ACT Code: TAC-TCG-CGC-ACC-GTA-TGC Give the complementary code, anticodons, and amino acids for the following: Codon: AUG - UCA - UCU - CGU - UAC - CCU - GCC-ACU-GCA - CUG - UAG Give the complementary code, codons, and amino acids for the following: Anticodon : UAC – CUA – GAC – AUG – GGG – CAU – UGG – CCA – GCA – AUU Complete the following tables: CODE: T-A-C A-T-G C-C-G T-G-G A-A-T C-G-C A-T-T CODON: ANTICODON: AMINO ACID: CODE: CODON: ANTICODON: U-A-C A-U-G U-U-C C-G-A AMINO ACID: CODE: CODON: A-U-G ANTICODON AMINO ACID: T-T-A C-C-U A-U-C A-U-C C-C-U A-C-U C-U-G T-A-C U-A-G