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- Q 1/10Score 0A model of a DNA molecule is shown here. The arrow indicates-29the hydrogen bond between complementary nucleotidesthe junction of entrons and exons in the sense strand of DNAthe junction of a codon and a DNA tripletthe bond between adjacent phosphate and deoxyribose molecules
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- Q1A model of a DNA molecule is shown here. The arrow indicates-the hydrogen bond between complementary nucleotidesthe junction of entrons and exons in the sense strand of DNAthe junction of a codon and a DNA tripletthe bond between adjacent phosphate and deoxyribose molecules30sBIOL.6a
- Q2Characteristics such as a widow’s peak or attached earlobes are determined by the genetic code. Which components of DNA are referred to as the genetic code?Phosphate groupsDeoxyribose sugarsNitrogenous basesHydrogen bonds30sBIOL.6a
- Q3How does DNA in cells determine an organism’s complex traits?DNA produces the energy an organism needs in order to grow.DNA separates into long single strands that make up each part of an organism.DNA contains codes for proteins, which are necessary for the growth and functioning of an organism.DNA folds into the nucleus of each of the cells of an organism.30sBIOL.6a
- Q4The sequence of nitrogenous bases in DNA varies widely. The sequence of the bases in DNA is most important for which of the following?Helping form the sugar-phosphate backbone of DNA moleculesProviding the instructions for the traits of an organismPreventing mutations from occurring during DNA replicationAllowing the DNA to have the shape necessary for replication30sBIOL.6a
- Q5In 1952 Rosalind Franklin took the x-ray photograph shown below, which gave the world its first look at DNA. By studying this photograph, scientists gained knowledge about the-role of DNA in protein synthesissequence of DNA that makes up the human genomedouble-helix structure of DNAmutation of nucleotide sequences in DNA30sBIOL.6a
- Q6A segment of DNA is represented in the illustration. How is information for a specific protein carried on the DNA molecule?As a sequence of nucleotidesIn the ratio of adenines to thyminesIn the double-helix shape of the condensed chromosomeAs a pattern of phosphates and sugars30sBIOL.6a
- Q7Human bone, muscle, and nerve cells all contain the same number of chromosomes with the same complement of genes. What enables these cells to perform specialized activities?The mutation of genes within each cell typeThe use of different methods of cell divisionThe ability of some cells to remove unnecessary DNA sequencesThe regulation of gene expression within each cell type30sBIOL.6a
- Q8Nitrogenous bases are located on both strands of the DNA double helix. What is the significance of the nitrogenous bases?The amount of thymine and guanine in the DNA molecules determines the length of the genes.The order of nitrogenous bases determines the order of amino acids in the proteins synthesized.The type of hydrogen bonding between the nitrogenous bases determines which amino acid will be added to the peptide chain.The number of adenines and cytosines determines the type of RNA that will be produced.30sBIOL.6a
- Q9Eight components present in nucleic acids are listed in the box. Which components bond with adenine in a section of double-stranded DNA?2 and 4 only3, 4, 7, and 8 only1, 3, 5 and 6 only3 an 5 only30sBIOL.6a
- Q10A segment of a DNA strand is shown. 3' AGGTCAGGT 5' Which of these is the correct complementary DNA strand for the segment shown?5' AGGTCAGGT 3'5' TCCAGTCCA 3'5' TGGACTGGA 3'5' ACCUGAGGU 3'30sBIOL.6a
