Which of the following is/are true about the primary structure of a protein? It does not include covalent bonds. 1. It can be changed by a genetic mutation. III. It is determined by the sequence of codons on mRNA during translation at the ribosomes. 11. OA. I, II and III OB. I and III only OC. I and II only OD. II and III only
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- The role of transfer RNA (tRNA) is to match a codon (3 bases) in mRNA sequence to: A. An amino acid B. A peptide bond C. An R group D. A start codonWhich of the following statements about mRNA is INCORRECT? A. the sugar moiety of mRNA is D-ribose B. the polynucleotide chain contains sequences made up of three bases called codons C. MRNAS have a 5'03' orientation D. all mRNAs have lengths equal to the DNA from which it is transcribed E. MRNA exists as single stranded moleculeWhich of the following is a true statement concerning RNA? Group of answer choices a. mRNA is single stranded; tRNA and rRNA are double stranded b. each tRNA binds to a specific amino acid c. rRNA and mRNA last for only a short time in the cell d. tRNA contains the base thymine
- Some events that take place in proteins synthesis are shown below: A. peptide bonds are formed B. a polypeptide is produced C. TRNAS bond to codons D. An MRNA attaches to the polypeptide synthesis site E. TRNAS enter the ribosome Which if the following shows the correct sequence? ОСDAЕ В ODECА В СED A В O DEACB EDABC D CEA B ОСDEВА O EDCAB АЕBDC EDACBWhich of the following is incorrect? a. Amino acids may have one or more triplet codes or codons b. Translation refers to the synthesis of RNA DNA replication is possible due to the complementarity of the two strands of DNA Od. A mutated gene can cause disease O c.Which of the following are the purposes of protein synthesis? A - Protecting bacteria from chemicals, like antibiotics B - Making food in plants, such as glucose C - Protecting animal cells by regulating how often cells divide D - All of these are purposes of protein synthesis
- Which of the following molecules is used to transfer the genetic code from the nucleus to the cytoplasm, during translation? 44. A. transfer RNA B. messenger RNA C. ribosomal glycoprotein D. phospholipids the itrarhar br vhaWhich of the following statements about RNA are true? (choose all that apply) O it is a polymer composed of amino acid subunits O it is assembled into much shorter lengths than DNA O it sometimes forms spirals O RNA functions include the transfer the information coded in DNA to the ribosomes, where proteins are manufactured O it is a polymer composed of multiple lipid subunits O it is composed of nucleic acidsIn translation of an mRNA into a protein, the first amino acid that is attached to the start codon is which of the following? a. O-formylmethionine b. Serine c. N-formylmethione d. Cysteine
- Four stages in the production of protein molecules in a cell are listed below. 1 - Transfer RNA molecules bring amino acids to the ribosome. 2 - DNA molecules serve as templates for messenger RNA molecules. 3 - Messenger RNA molecules move to ribosomes. 4 - A chain of amino acids forms on the ribosome. Which sequence best represents the correct order of these stages? 2-1-3-4 2-3-1-4 3-2-1-4 4-2-1-3Which of the following are transcribed from DNA? Select one: a. protein Ob. exons Oc c. rRNA exons, introns and rRNA d. O e. introns1. Below is a sequence of mRNA. Use it to answer the questions below. 5' – AACUCCAUGCUUAUUGCUGGCUGAAAUCGACG-3' How many amino acids will be present in the protein? Write the order of the amino acids in this protein. а. b.