Regarding the double helix of DNA, which of the following is true?   a. Guanine pairs up with cytosine with three hydrogen bonds   b. Complementary strands of DNA are held together by covalent bonds   c. The backbone consists of ribose sugars H-bonded to phosphate groups   d. Uracil pairs up with adenine with two hydrogen bonds

8:47 ll 5G% 4 Chapter 9 DNA worksheet 2022.d... 2. Write the mRNA transcript from the DNA template in question 1. Remember your enzyme for RNA polymerase must add RNA nucleotides starting with the 5' direction and moving to the 3' direction. So for the MRNA copy the strand of DNA that is 3'-5') 3. Refer to the codon chart at the bottom of the page. Translate the mRNA into a polypeptide using the following rules. (2 points) Direction of translation of mRNA is from 5' to 3'. 1. MRNA codons are read in groups of three nucleotides. 3. Translation must begin at the START codon. 4. the STOP codon terminates translation. 2. THIRD LETTER SECOND LETTER U TulUUU Phe UUC Phe UUA Leu UUG Leu A UGU Cys U JUGC Cys C UCU Ser UAU Tyr UCC Ser UAC Tyr UCA Ser UAA STOP UGA STOPA UCG Ser UAG STOPUGG Tp G CCUU Leu CÚC Leu CỦA Leu CUG Leu AJAUU Ile AUC Ile AUA Ile AUG Met STARTACG ThrAAG Lys GGUU Val GUC Val GUA Val GUG Val CCU Pro CAU His CCC Pro CAC His CCA Pro CAA Gln CCG Pro CAG Gln ACU ThrAAU Asn AGU…

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DNA Stability/Chapter 4 A solution of DNA contains two different DNA molecules. Molecule 1 is 500 base pairs and contains 100 A’s. Molecule 2 is 500 base pairs and contains 300 A’s. (1) How many AT base pairs and GC base pairs is in each DNA molecule? (2) How many, G’s, A’s, T’s and C’s are in each molecule? (3) Draw one figure that shows the relative melting temperature of the two DNA molecules.

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A cluster of ribosomes. In a polysome, or polyribosome, the polypeptides associated with which ribosomes will be the longest: a. They will be the same length since the rate of translation is constant. b. Those at the 3'-end3'-end of the mRNA. c. Those at the 5'-end5'-end of the MRNA. d. Those in the middle of the mRNA.

4A. In the human gene for the beta chain of haemoglobin (the oxygen-carrying protein in the red blood cells), the first 30 nucleotides in the amino-acid-coding region is represented by the sequence: 3'-TACCACGTGGACTGAGGACTCCTCTTCAGA-5'.   What is the sequence of the partner strand?