Dna double helix Study guides, Class notes & Summaries

Exam 1: BIOS 252 / BIOS252 (2024/ 2025 Update) Anatomy and Physiology II Exam Review| Guide with Questions and Verified Answers| 100% Correct| Rated A -Chamberlain Q: Enzymes and their function -type of protein, chemical catalysts help chemical reaction occur Chamberlain Q: List and describe the chemical structure/components of DNA Answer: -Used as the cell's "master code" for assembling proteins -uses deoxyribose as sugar and A, T(not U), C, and G as bases -form...

Biology Final Exam chapters 1,2,5 EXAM QUESTIONS AND ANSWER joined by a phosphodiester bond to form the backbone of the DNA Double Helix - CORRECT ANSWER Nucleotide Created the double helix structure - CORRECT ANSWER Watson and Crick what are the nitrogenous bases? - CORRECT ANSWER adenine, thymine, cytosine, guanine the backbone of DNA - CORRECT ANSWER sugar phosphate group DNA strands are very - CORRECT ANSWER stable The 3 configurations of DNA - CORRECT ANSWER A, B, C the seq...

Question 1 Correct 1.00 points out of 1.00 Flag question Question text In an ecosystem, energy Select one: a. comes ultimately from bacteria b. cycles along with chemical nutrients c. typically flows from producers through a series of consumers d. typically flows from consumers to producers to decomposers Question 2 Correct 1.00 points out of 1.00 Flag question Question text Life is organized in a hierarchical fashion. Which of the following sequences correctly lists that hierarchy from least in...

The structure of a strand of DNA. - it is a double helix, like a twisted ladder. the ladder rings are nucleotide subunits and they have a covalent bond to the sugar phosphate backbone (made of deoxyribose and a phosphate group) What are the nucleotide subunits? - adenine, guanine, cytosine, and thymine How are the subunits held together? - through a hydrogen bond What are the nucleotide subunits compliments? - Adenine and thymine cytosine and guanine How does DNA replicate? - the parent s...

7Q1-Describe the double helix nature of DNA. Why is it that DNA is always found as a double stranded, antiparallel and complementary molecule? Correct Answer-The two strands of DNA run in anti-parallel directions and attached to each sugar is one of four types of nitrogenous bases, which make hydrogen bonds. It is antiparallel and complementary so that it has two copies as a safety measure. 7Q2-What are histones and the structural components(DNA/proteins)of a nucleosome? Correct Answer-Histon...

Humans produce sweat as a cooling mechanism to maintain a stable internal temperature. Which of the following best explains how the properties of water contribute to this physiological process? - ANSWER The high heat of vaporization of water allows the body to remove excess heat through a phase change of water from liquid to gas A student placed a semipermeable membrane inside a U-shaped channel with two chambers, as shown. The membrane permits the movement of water but not salt. The...

DNA is composed of ____ subunits. - Nucleotide DNA has a ____ backbone covalently bonded to _____-containing bases - Sugar-phosphate Nitrogen A DNA molecule contains how many strands of DNA? These strands form what? This means that they are _____. - 2 A double helix Complementary What are the nitrogen-containing bases? - Adenine Guanine Thymine Cytosine

How many base pairs are in the human genome? 3 billion 2. Structure of nucelotide Nitrogenous base, pentose sugar, and a phosphate group 3. Purines adenine (A) and guanine (G) 4. pyrimidines cytosine (C), thymine (T), and uracil (U) 5. nucleoside purine or pyrimidine base attached only to a sugar 6. nucleotide nitrogenous base attached to a sugar and a phosphate group 7. phosphodiester bond the type of bond that links the nucleotides in DNA or RNA. joins the phosphate group of on...

The model of DNA structure proposed by Watson & Crick after analysis of Rosalind Franklin's X-ray crystallography data stated that DNA is: Correct Answer-a double stranded helix DNA polymerase requires a template but not a primer to synthesize a new strand of DNA. Correct Answer-False Watson & Crick and Franklin also proposed (and we know now that this is true) that the backbone of the DNA molecule is composed of: Correct Answer-sugar + phosphate Type the letter of the strand that repr...

Which of the following is NOT a macromolecule? A. The enzyme helicase B. A lysosome C. A phosopholipid D. RNA correct answer: B Which of the following statements about DNA is NOT correct? A. If a DNA double helix contains 28% A, we can calculate the amounts of T, C, and G. B. In a DNA double helix, the two DNA strands run antiparallel to each other. C. The two DNA strands in a DNA double helix are held together by hydrogen bonds between the DNA bases. D. DNA is synthesized 5' to 3'...