Homework Answers
1. double helix, antiparallel, twisted
2. Nitrogen bases, 2, hydrogen bonds
3. deoxyribose, phosphate group
4. antiparallel, parallel, opposite
5. thymine, guanine
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Complete the sentences to describe the structure of DNA. Labels may be used more than once...
Each of the following statements about the structure of DNA may be either true or false....
Each of the following statements about the structure of DNA may be either true or false. Choose the appropriate answer for each of these statements. Bonding between adenine and thymine on opposite strands involves two hydrogen bonds. Nitrogenous bases are located on the outside of the double helix: phosphates are located towards the middle of the double helix. Bonding between guanine and cytosine on opposite strands involves three hydrogen bonds. DNA and RNA are structurally different due to the difference...
RNA differs from DNA in that it: all of the above contains ribose sugar contains uracil...
RNA differs from DNA in that it: all of the above contains ribose sugar contains uracil is usually found as a single-stranded molecule in cells Question 21 pts The correct order of steps in a PCR cycle is: Extension, denaturation, annealing Annealing, extension, denaturation Annealing, denaturation, extension Denaturation, annealing, extension The goal of the polymerase chain reaction (PCR) is to: Amplify a small amount of DNA sequence Cleave DNA molecules Digest bacterial plasmids Sequence DNA Which of the following is...
Select the phrases that accurately describe properties of the most common form of the DNA double helix
Select the phrases that accurately describe properties of the most common form of the DNA double helix. There is more than one correct answer. Select all that apply. DNA contains equal amounts of adenine and thymine, and equal amounts of cytosine and guanine. A helical turn consists of about 10 nucleotides. Base pairs have a spacing of 20 A. The phosphodiester bonds between nucleotide residues run in opposite directions in the two strands. The nitrogenous bases are exposed to the solvent, whereas the sugar-phosphate backbone of...
QUESTION 11 Which is true of the structure the DNA double helix? A. The sugar-phosphate backbone...
QUESTION 11 Which is true of the structure the DNA double helix? A. The sugar-phosphate backbone faces outward. B. The nitrogen-containing bases face inward and form hydrogen bonds to one another. C. Adenine (A) bonds to Thymine (T). D. Adenine (A) bonds the Cytosine (C).
In the DNA double helix, 2 strands of DNA are joined together through the hydrogen bonding...
In the DNA double helix, 2 strands of DNA are joined together through the hydrogen bonding of the individual base pairs. The base Guanine bonds to which other base. Answers: a. uracil b. cytosine c. thymine d. adenine
Question 3 (1 point) Match these terms relating to base pairing 1. hydrogen bonds link A-T...
Question 3 (1 point) Match these terms relating to base pairing 1. hydrogen bonds link A-T and G-C. These make "rungs" of DNA ladder shape of RNA 2. number of bonds between Adenine & thymine, or between adenine and uracil complementary base pairing > phosphodiester linkage 3. weak, yet many hold DNA strands together, or RNA that folds back on itself < 2 4. shape of DNA Double helix 5. Single strand, but can fold back on itself to give...
DNA is formed by building blocks called __________. nucleotides nitrogenous bases polypeptides deoxyribose 0.5 points ...
DNA is formed by building blocks called __________. nucleotides nitrogenous bases polypeptides deoxyribose 0.5 points QUESTION 2 What does DNA stand for? Double-stranded Nucleic Acid Ribonucleic acid Deoxyribonucleic Acid Double-helix Nucleic Acid 0.5 points QUESTION 3 The nucleotides of DNA are held together by ___________. ionic bond hydrogen bond phosphodiester bond sugar-phosphate backbone 0.5 points QUESTION 4 DNA nucleotides with one-carbon nitrogen ring bases are called ________. adenines purines pyrimidines guanines 0.5 points QUESTION 5 Basic...
Below are bases used in nucleic acids. (a) why are they called bases-what allows them to act as a base? (b) the two str...
Below are bases used in nucleic acids. (a) why are they called bases-what allows them to act as a base? (b) the two strands of DNA are held together in the double helix form by hydrogen bonds between complementary base pairs. What is a hydrogen bond? (c) Suppose a new disease appears that creates covalent, rather than hydrogen, bonds between the two strands of DNA (this is VERY unlikely!). If you had to design a drug to combat the disease,...
Unwinds DNA strand to make replication fork. Adds free nucleotides to the growing daughter DNA strands...
Unwinds DNA strand to make replication fork. Adds free nucleotides to the growing daughter DNA strands Adds short pieces of RNA to help DNA polymerase start Removes RNA and replaces with DNA Fuses or "glues" fragments of DNA together Proofreads or edits the DNA, checking for mistakes Given the following, DNA Sequence, what is the new daughter strand? (Did you label the 5' and 3' ends?) What is the name of the "fragments" of DNA on the lagging strand after...
(CHO)n-C7H1403-C7H1407 C7H107 cellulose and chitin- starch and glycogen-sucrose-galactose- maltose-fructose-fatty acids- polymer- monomer- saturated- unsaturated-glycerol-glycogen-collagen -hemoglobin-ribose- nitrogen...
(CHO)n-C7H1403-C7H1407 C7H107 cellulose and chitin- starch and glycogen-sucrose-galactose- maltose-fructose-fatty acids- polymer- monomer- saturated- unsaturated-glycerol-glycogen-collagen -hemoglobin-ribose- nitrogen base- chitin-phosphate group-insulin-pentose sugar-carbon- nitrogen- hydrogen-phosphorus- steroids- hydrolysis- dehydration-hydrogen bond- covalent bond-peptide bond- disulfide bond-guanine-cytosine- adenine-thymine-uracil-van der Waals-hydrophobic- sugar and phosphate bond- 26. DNA has the nitrogen baso instead of 27. In the structure of protein, the amino acids are joined together by 28. The backbone of DNA strands forms a bond between 29. These are nitrogenous bases from the type purines and 30....
Each of the following statements about the structure of DNA may be either true or false. Choose the appropriate answer for each of these statements. Bonding between adenine and thymine on opposite strands involves two hydrogen bonds. Nitrogenous bases are located on the outside of the double helix: phosphates are located towards the middle of the double helix. Bonding between guanine and cytosine on opposite strands involves three hydrogen bonds. DNA and RNA are structurally different due to the difference...
Question 3 (1 point) Match these terms relating to base pairing 1. hydrogen bonds link A-T and G-C. These make "rungs" of DNA ladder shape of RNA 2. number of bonds between Adenine & thymine, or between adenine and uracil complementary base pairing > phosphodiester linkage 3. weak, yet many hold DNA strands together, or RNA that folds back on itself < 2 4. shape of DNA Double helix 5. Single strand, but can fold back on itself to give...
Below are bases used in nucleic acids. (a) why are they called bases-what allows them to act as a base? (b) the two strands of DNA are held together in the double helix form by hydrogen bonds between complementary base pairs. What is a hydrogen bond? (c) Suppose a new disease appears that creates covalent, rather than hydrogen, bonds between the two strands of DNA (this is VERY unlikely!). If you had to design a drug to combat the disease,...
Unwinds DNA strand to make replication fork. Adds free nucleotides to the growing daughter DNA strands Adds short pieces of RNA to help DNA polymerase start Removes RNA and replaces with DNA Fuses or "glues" fragments of DNA together Proofreads or edits the DNA, checking for mistakes Given the following, DNA Sequence, what is the new daughter strand? (Did you label the 5' and 3' ends?) What is the name of the "fragments" of DNA on the lagging strand after...
(CHO)n-C7H1403-C7H1407 C7H107 cellulose and chitin- starch and glycogen-sucrose-galactose- maltose-fructose-fatty acids- polymer- monomer- saturated- unsaturated-glycerol-glycogen-collagen -hemoglobin-ribose- nitrogen base- chitin-phosphate group-insulin-pentose sugar-carbon- nitrogen- hydrogen-phosphorus- steroids- hydrolysis- dehydration-hydrogen bond- covalent bond-peptide bond- disulfide bond-guanine-cytosine- adenine-thymine-uracil-van der Waals-hydrophobic- sugar and phosphate bond- 26. DNA has the nitrogen baso instead of 27. In the structure of protein, the amino acids are joined together by 28. The backbone of DNA strands forms a bond between 29. These are nitrogenous bases from the type purines and 30....
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