Which of the following substances is involved in de novo synthesis of purine nucleotides but not pyrimidine nucleotides () A, glutamine B, glutamate C, aspartic acid D, glycine What is wrong with the statement about the B-type DNA double helix model is that () A, the base plane and the pentose plane are perpendicular to each other B. The base plane is located outside the helix C. The two chains are stabilized by interbase hydrogen bonding D. is a right-handed spiral structure The enzymes in common with the following enzymes that catalyze glycolysis and gluconeogenesis are () A, hexokinase B, phosphoglycerate kinase C, 1, 6-2p-fructokinase and D, pyruvate kinase Which of the following enzyme catalyzed reactions does not involve the production or consumption of carbon dioxide () A, pyruvate carboxylase B, isocitrate dehydrogenase C, 6-P-gluconate dehydrogenase and D, succinate dehydrogenase

Which of the following substances is involved in de novo synthesis of purine nucleotides but not pyrimidine nucleotides () A, glutamine B, glutamate C, aspartic acid D, glycine What is wrong with the statement about the B-type DNA double helix model is that () A, the base plane and the pentose plane are perpendicular to each other B. The base plane is located outside the helix C. The two chains are stabilized by interbase hydrogen bonding D. is a right-handed spiral structure The enzymes in common with the following enzymes that catalyze glycolysis and gluconeogenesis are () A, hexokinase B, phosphoglycerate kinase C, 1, 6-2p-fructokinase and D, pyruvate kinase Which of the following enzyme catalyzed reactions does not involve the production or consumption of carbon dioxide () A, pyruvate carboxylase B, isocitrate dehydrogenase C, 6-P-gluconate dehydrogenase and D, succinate dehydrogenase

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter8: The Structure, Replication, And Chromosomal Organization Of Dna

Section: Chapter Questions

Problem 16QP: A beginning genetics student is attempting to complete an assignment to draw a base pair from a DNA...

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Using Figures 8.7 and 8.9 as a guide, draw a dinucleotide composed of C and A. Next to this, draw the complementary dinucleotide in an antiparallel fashion. Connect the dinucleotides with the appropriate hydrogen bonds. FIGURE 8.9 The two polynucleotide chains in DNA run in opposite directions. The left strand runs 5 to 3, and the right strand runs 3 to 5. The base sequences in each strand are complementary. An A in one strand pairs with a T in the other strand, and a C in one strand is paired with a G in the opposite strand. FIGURE 8.7 Nucleotides can be joined together to form chains caled polynucleotides. Polynucleotides are polar molecules with a 5 end (at the phosphate group) and a 3 end (at the sugar group). An RNA polynucleotide is shown at the left, and a DNA polynucleotide is shown at the right.
A beginning genetics student is attempting to complete an assignment to draw a base pair from a DNA molecule. The drawing is incomplete, and the student does not know how to finish. He asks for your advice. The assignment sheet shows that the drawing is to contain three hydrogen bonds, a purine, and a pyrimidine. From your knowledge of the pairing rules and the number of hydrogen bonds in A/T and G/C base pairs, what base pair do you help the student draw?
State the properties of the WatsonCrick model of DNA in the following categories: a. number of polynucleotide chains b. polarity (running in same direction or opposite directions) c. bases on interior or exterior of molecule d. sugar/phosphate on interior or exterior of molecule e. which bases pair with which f. right- or left-handed helix
Which of the following statements is correct? A. The 3’-end of a DNA double helix implies that both strands of the DNA helix have a free 3’- hydroxyl group on that end. B. DNA can form double helix while RNA cannot form double helix. C. Both A and B. D. Neither A nor B. The role of serine at the active site of serine proteases is to act as a(n) ________ catalyst, while the histidine residue serves as a(n) ________ catalyst. A. weak; strong B. acid-base; covalent C. anionic; ionic D. covalent; acid-base E. strong; weak
When DNA is heated, it denatures; that is, the strands separate because hydrogen bonds are broken and some base-stacking and hydrophobic interactions are disrupted. The higher the temperature, the larger the number of hydrogen bonds that are broken. After reviewing DNA base pair structure, determine which of the following molecules will denature first as the temperature is raised. Explain your reasoning. a. 5′-GCATTTCGGCGCGTTA-3′ 3′-CGTAAAGCCGCGCAAT-5′ b. 5′-ATTGCGCTTATATGCT-3′ 3′-TAACGCGAATATACGA-5′
Which statement about nonpolar interactions in the formation of the DNA double helix is INCORRECT? A. Van der Waals interactions are nearly optimal in a double-helical structure. B. Nonpolar surfaces of the bases are moved into contact with each other due to a more complete base stacking. C. Nucleotide bases tend to stack even in single-stranded DNA molecules. D. The separation distance of the planes of adjacent bases needs to be adjusted for the favorable van der Waals contacts. E. Surface complementary maximizes the formation of hydrogen bonds and van der Waals interactions while minimizing the nonpolar surface area exposed to the aqueous environment.
Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes? Group of answer choices A. All bases would be separated from the deoxyribose sugars B. The purines would be separated from the deoxyribose sugars C. The phosphodiester linkages between deoxyribose sugars would be broken D. The two strands of the double helix would separate E. The pyrimidines would be separated from the deoxyribose sugars
The following diagram of a generalized tetranucleotide will serve as a basis for the three questions marked “a” through “c.” (02) (a) Is this a DNA or an RNA molecule? State which _________ (b) Place an “X” (in one of the circles provided) at the 3' end of this tetranucleotide. (c) Given that the DNA strand, which served as a template for the synthesis of this tetranucleotide, was composed of the bases 5'- A C A G - 3', fill in the parentheses (in the diagram) with the expected bases
In a DNA Double helix ,why doesn't an A or T form two hydrogen bonds(out of the three possible) with G or C? Explain in detail.
DNA solution is viscous because of the nature of chemical substance that can intercalate into the DNA helix. An example of such substance is acridine orange. experiments revealed that acridine orange causes an increase in the viscosity of DNA solution.how would you account for this effect?
The base composition of one of the DNA chains of a DNA double helix contains 18 mol-%A, 35 mol-%T, 26 mol-%C, and 21 mol-%G (a) What is the base composition of the complementary DNA chain? (b) Is the total amount of purine bases equal to the total amount of pyrimidine bases for the DNA double helix?
Ethidium Bromide is a chemical reagent that has been used to detect the presence of nucleic acids. It is known to fluoresce under UV light and the intensity of the fluoresence increases when it binds to the nucleic acids. Ethidium Bromide binds to polynucleotides a by binding directly to the bases on one of the strands. b by intercalating itself between the base pair stacks. c through the negatively charged phosphate groups. d through the hydroxyl group of the sugar molecule.