C785 Biochemistry Module 1 Quiz 2020

C785 Biochemistry Module 1 Quiz 2020 – Western Governors University You are designing a piece of DNA for a project and must select the appropriate nitrogenous bases. Which combination of nitrogenous bases would you find most suitable for your work? Select one: a. Adenine, Guanine, Thymine, Cytosine Correct! These nitrogenous bases, in combination with deoxyribose sugar and phosphate, form the nucleotides that are bonded together to form a long polymer of DNA - the carrier of genetic information. b. Adenine Guanine, Uracil and Thymine c. Thymine, Uracil, Adenine, Cytosine d. Adenine, Thymine, Cytosine, Uracil The DNA sequence 3’-ATGATCCTT-5’ is part of the template strand during DNA replication. Which of the following would be the correct sequence for the newly made DNA? Select one: a. 5’-ATGATCCTT-3’ b. 5’-GCAGCTTCC-3’ c. 5’-TACTAGGAA-3’ d. 5’-UACUAGGAA-3’ Incorrect. In this option U has been used instead of T. Although this is how an mRNA molecule would be created from the DNA, it is not the appropriate complementary base when replicating the DNA. Recall that during replication, the bases on the newly made daughter strand are complementary to the bases on the template strand using the following base pairing rules: A with T and G with C. Which of the following statements is TRUE about RNA? Select one: a. There are several types of RNA in the cell, including mRNA, rRNA, and tRNA. b. RNA nucleotides include the bases A, U, C, and G. c. RNA is single stranded and contains a ribose sugar in the sugar-phosphate backbone. d. All of these Correct! All of these statements about RNA are true. The cell contains mRNA, rRNA, and tRNA molecules, RNA is single stranded, RNA contains a ribose sugar in the sugar-phosphate backbone, and RNA nucleotides include the bases A, U, C, and G. What is the complementary DNA strand for the DNA sequence 5'-ATT CGG GCT CCC -3'? Select one: a. 5' - CCC TCG GGC TTA -3 b. 5'- UAA GCC CGA GGG -3' c. 5'- ATT CGG GCT CCC -3' d. 5'- GGG AGC CCG AAT -3 Correct! The DNA complementary strand would be 5'- GGG AGC CCG AAT -3', when written in the conventional way starting with the 5' end of the strand. A research scientist is trying to create a new strain of bacteria that can produce a protein needed for her research. Which of the following molecules will act as a template in creating the protein? Select one: a. Ribozyme Incorrect. Ribozymes are certain RNA molecules which are able to catalyze certain reactions. They do not provide the template sequence for the creation of the Protein. DNA carries the genetic information in the form of specific DNA sequences. The stretches of DNA which contain information for specific proteins are referred to as genes. In order to make a protein, the gene must first be transcribed into messenger RNA (mRNA) which contains the complementary sequence to one of the DNA strands of that specific gene. This message within the mRNA is then translated by the ribosome to produce a protein.