Dr. Herman Branson.... was a physicist and chemist that discovered the double-helix structure in DNA was a physicist and chemist that discovered the loop structure in proteins was a physicist and chemist that discovered the beta-strand structure in proteins was a physicist and chemist that discovered the alpha-helix structure in proteins
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- . Which of the following statements best summarizes the differences between DNA and RNA? A) DNA is transcribed using RNA polymerase to form mRNA and mRNA is translated by the Ribosome to form a polypeptide, B) The bases in DNA contain sugars, whereas the bases in RNA do not contain sugar. C) DNA nucleotides contain a different glucose compared to RNA nucleotides. D) DNA is formed using the base uracil, whereas RNA uses the base thymine. E) DNA encodes the sequence of amino acids for the primary structure of a polypeptide whereas mRNA does notThree nucleotides are read at a time. What are these nucleotides called?A......of a DNA consists of a sugar, a phosphate, and a nitrogen containing base. A....... is a change in the base sequence of a DNA molecule Took x-ray images of DNA molecule Name 3 types of RNA and list their roles in making proteins
- Which of the following statements are TRUE?I. DNA replication is a semiconservative process wherein the two resulting double helices consist of one new strand and one parental strand.II. The DNA strand that is used to make a complementary daughter strand is called the parental strand.III. The precursor of each new nucleotide in the DNA strand is a deoxynucleoside 3′-triphosphate.IV. The incoming nucleotide always attaches to 5′-phosphate of the previously added nucleotideWhich of the following statements are TRUE?I. DNA replication is a semiconservative process wherein the two resulting double helices consist of one new strand and one parental strand.II. The DNA strand that is used to make a complementary daughter strand is called the parental strand.III. The precursor of each new nucleotide in the DNA strand is a deoxynucleoside 3′-triphosphate.IV. The incoming nucleotide always attaches to 5′-phosphate of the previously added nucleotide a. I only b. II only c. I and IV d. III and IVThe nucleotides are very specific as to which bond together. The four nucleotides are:Adenine (A) Thymine (T)Guanine (G) Cytosine (C)They are written out in this order because Adenine always bonds with Thymine and Cytosine alwaysbonds with Guanine. Draw a line connecting those so you remember.Let’s practice making complementary strands. DNA: T-A-C-T-T-A-C-A-C-G-T-C-A-A-C-G-T-G-C-C-T-T-A-G-C-C-A-T-TDNA: A-T-GGo ahead and write out the complementary strand to the strand above continuing where we left off.
- If a strand of DNA has the sequence CGGTATATC, then the complementary strand of DNA has the sequence (a) ATTCGCGCA. (b) GCCCGCGCT. (c) GCCATATAG. (d) TAACGCGCT.7) In DNA/RNA chains, what is the direction of synthesis? 8) DNA is double-stranded. What intermolecular force holds the two strands together? 9) Chromosomes are composed of chromatin. Chromatin is composed of nucleosomes. What are the components of nucleosomes? 10) Watch the Nova documentary ("The Secret of Image 51") or read the Nature article on Rosalind Franklin. Write a short summary and your reaction.A DNA strand consists of any sequence of four kinds of nucleotides. Suppose there were only 14 different amino acids instead of 20. Which of the following statements would be correct descriptions of the minimal number of nucleotides necessary to create a genetic code? a) 1 b)2, provided that chain termination does not require a special codon c) 3, provided that chain termination does require a special codon d)2, no matter how chain termination is accomplished e) Both b and c
- Which of the following conventions is used to specify the sequence of bases in DNA a) The sequence begins with the nucleotide that has a free 3' terminus b) The sequence begins with the nucleotide that has a free 5' terminus c) The sequence begins from the end closest to the first adenine d) The sequence begins from the end closest to the first thymineIllustrate some steps involved in DNA replication :Suppose the following base sequence was found in a segment of one strand of a DNA molecule: 3’ A-A-T-A-C-C-T-C-C-T-A-A-C-T 5’ What would be the bases in the complementary strand? Label the 3’ and the 5’ ends. Illustrate the DNA molecule below. Label the 3’ and the 5’ ends of both strands. Separate the above DNA molecule up to the seventh base. Add one primer for the leading strand complementary to the first base Adenine of the template strand. Add one primer for the lagging strand complementary to the seventh base Adenine of the template strand. Illustrate the DNA molecule. Label the 3’ and 5’ ends. Elongate the new strands up the seventh base by adding DNA bases complementary to the template strand. Illustrate the resulting DNA molecule. Label the 3’ and the 5’ ends of the template strands and the complementary strands. Elongate the new strands up the seventh base by adding DNA bases complementary to the template strand. Illustrate…The sequence below shows one strand of DNA. Parts of the sequence are in capital letters to help you identify important features - capitalization does not affect the nucleotide indicated. 5' ...atacaATGcATGTCAaCTAcg[a]agatccgTAGaTAACATtCATatc...3' a) Underneath that strand, write the sequence of the strand of DNA it would be paired with in a double-stranded helix. Use the single letter code A-adenosine, G-guanosine, T-thymine, C-cytosine, and U-uracil, and remember to label the 5' and 3' ends b) Next, write the sequence of a possible mRNA transcript of the double-stranded DNA above. Remember that an mRNA must be translatable by a ribosome into a protein. Be sure to indicate 5' and 3' ends c) Using the genetic code at the end, translate your mRNA into the appropriate protein. Write the amino acid sequence of the protein using the single letter amino acid code (also at the end) below the mRNA sequence in (b) and label the amino and carboxy terminals d) Suppose the bracketed bold [a] were…
