05:12Introduction to nucleic acids and nucleotides | High school biology | Khan AcademyKhan Academy1092views2rank
Multiple ChoiceWhich of the following descriptions best fits the class of molecules known as nucleotides?a) A nitrogenous base & a phosphate group.b) A nitrogenous base & a sugar.c) A nitrogenous base, phosphate group & a sugar.d) A nitrogenous base, a carbohydrate, & a sugar.3420views29rank
Multiple ChoiceThe four nitrogenous bases commonly found if DNA are: a) Adenine, thymine, cytosine, uracil b) Uracil, adenine, cytosine, guanine.c) Uracil, cytosine, guanine, thymine.d) Adenine, thymine, cytosine, guanine.e) None are correct.4230views26rank
Multiple ChoiceWhich of the following statements about DNA structure is true?a) The nucleic acid strands in a DNA molecule are oriented antiparallel to each other.b) Nucleic acids are formed through phosphodiester bonds that link complementary nucleobases together.c) Hydrogen bonds formed between the sugar-phosphate backbones of the two DNA chains stabilize the structure.d) The pentose sugar in DNA is ribose (containing two hydroxyl groups).4626views32rank1comments
Multiple ChoiceWhich of the following is true regarding complementary base pairing in DNA and RNA molecules? 1730views1rank
Multiple ChoiceWhich of the following lists represents the chemical components of a nucleotide? 2700views
Multiple ChoiceBased on complementary base pairing, you would expect the percentage of __________ to be equal to the percentage of __________. 1099views
Multiple ChoiceA shortage of phosphorus in the soil would make it especially difficult for a plant to manufacture __________. 932views
Textbook QuestionA shortage of phosphorus in the soil would make it especially difficult for a plant to manufacture a. DNA. b. proteins. c. cellulose. d. sucrose.1752views
Textbook QuestionRNA and DNA are similar because . a. both are double-stranded helices; b. uracil is found in both of them; c. both contain the sugar deoxyribose; d. both are made up of nucleotides consisting of a sugar, a phosphate, and a base1615views
Textbook QuestionIn the field of nanotechnology, DNA is used like Velcro to assemble tiny particles into structures that are < 0.0001 mm in size. Draw a model to illustrate how two particles (a circle and a square) could be brought together by linking them to short single-stranded DNA molecules. If the DNA sequence linked to the circle is GGATC, then provide the sequence linked to the square and identify the 5′ and 3′ ends of each strand.1011views
Textbook QuestionExplain the role of complementary base pairing in the functions of nucleic acids.914views
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