Which of the following statements about the structure or composition of DNA is FALSE? O DNA is a double helix O Complementary base-pairing occurs between pyrimidine and purine bases O The amount of thymine closely approximates that of guanine within a particular organism O The base-pairing is mediated by hydrogen bonding O Adenine pairs with thymine and guanine with cytosine

Which of the following statements about the structure or composition of DNA is FALSE? O DNA is a double helix O Complementary base-pairing occurs between pyrimidine and purine bases O The amount of thymine closely approximates that of guanine within a particular organism O The base-pairing is mediated by hydrogen bonding O Adenine pairs with thymine and guanine with cytosine

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 15QP: Using Figures 8.7 and 8.9 as a guide, draw a dinucleotide composed of C and A. Next to this, draw...

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One species DNA differs from others in its _______. a. nucleotides c. double helix b. DNA sequence d. sugar-phosphate backbone
Which is not a nucleotide base in DNA? a. adenine b. guanine c. glutamine d. thymine e. cytosine f. All are in DNA.
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.
Which of the following does cytosine pair with? a. guanine b. thymine c. adenine d. a pyrimidine
Which of the following statements about the DNA double helix is FALSE? O The base pairs are located in the center of the helix O The plane of the base pairs is perpendicular to the direction of the deoxyribose- phosphate backbone O The two strands have the same 5' to 3' direction (i.e, are parallel) O The base pairs stack on one another O The deoxyribose-phosphate backbone is on the outside of the helix
Which of the following is true about DNA ? * Two DNA strands are twisted around each other to form an anti-parallel double helix Adenine pairs with thymine though 2 hydrogen bonds (A=T) Guanine pairs with cytosine through 3 hydrogen bonds (GEC). O All of them
Which of the following combinations is nucleotide molecule? The nitrogenous base uracil bonded to ribose and phosphate complemented with the addition of a water molecule A nucleoside resulting from the dehydration reaction between two phosphates, glycerol, and an unsaturated fatty acid. The DNA backbone consisting of three phosphate groups, a 5-carbon nitrogenous base, and a nitrogen-containing sugar residue An ATP molecule is formed by combining adenine, ribose, and three inorganic phosphate groups
Which of the following statements regarding DNA is false? Features a beta glycosidic bond between deoxyribose and nucleobase. Phosphoester bonds in DNA are extremely stable to non-catalytic hydrolysis. In B DNA the parallel stacks of nucleobases are separated by about 3.5 A A DNA is formed from single strands of RNA and DNA DNA contains uridine, adenosine, guanosine, and cytidine as nucleobases.
RNA is hydrolyzed in basic solution, but DNA is not. This occurs because ORNA has modified bases, but DNA does not thymine is found in DNA, and uracil is not O DNA contains 2'-deoxyribose, but RNA does not O DNA is double stranded, and RNA is single stranded
Differences between DNA and RNA include which of the following? ORNA uses thymine O RNA is most commonly double stranded O DNA has a 2'-OH O None of these answers are correct O DNA uses uracil
Which of the following is a difference between DNA and RNA? * DNA is a single strand, but RNA is a double strand DNA has uracil, but RNA has Thymine DNA has to stay inside the nucleus, but RNA can travel DNA has a ribose sugar, RNA has a deoxyribose sugar Lenovo 女 esc # 2$ 8. 4 1 y u i e r tab a g V shift alt ctri tri alt
CYTOSINE PURINE PHOSPHATES NITROGENOUS BASES PYRIMIDINE SUGARS THYMINE URACIL Alternating deoxyribose and form the backbone of DNA structure, and the are stacked like rungs inside. A purine always pairs with a ; Adenosine always pairs with and Guanine pairs with