TEKS Biology High School - B.6.A: DNA Components
Quiz by TEKS Biology High School
High School - Biology
Science (2010)
Texas Essential Knowledge and Skills (TEKS)
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13 questions
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- Q1Differences in traits such as hair texture are determined by differences in —the sequence of nucleotides in DNAthe location of sugar groups in DNAthe number of nitrogenous bases in DNAthe molecules attached to the phosphate in DNA30sB.6.A: DNA Components
- Q2A student used poster board to construct this model of a section of DNA. Which statement describes this model of DNA?The model is inaccurate because the base pairs are incorrectThe model is accurate because it contains correctly paired basesThe model is accurate because it shows each base splitting to form a double helixThe model is inaccurate because some typical bases in DNA are missing30sB.6.A: DNA Components
- Q3Nitrogenous bases are located on both strands of the DNA double helix. What is the significance of the nitrogenous bases?The type of hydrogen bonding between the nitrogenous bases determines which amino acid will be added to the peptide chainThe number of adenines and cytosines determines the type of RNA that will be producedThe order of nitrogenous bases determines the order of amino acids in the proteins synthesizedThe amount of thymine and guanine in the DNA molecules determines the length of the genes30sB.6.A: DNA Components
- Q4Each strand of a DNA molecule contains nitrogenous bases that pair with other nitrogenous bases in very specific ways. A diagram of a section of DNA is shown. Which DNA strand is complementary to the one shown above?30sB.6.A: DNA Components
- Q5A segment of DNA is represented in the illustration. How is information for a specific protein carried on the DNA molecule?In the ratio of adenines to thyminesIn the double-helix shape of the condensed chromosomeAs a pattern of phosphates and sugarsAs a sequence of nucleotides30sB.6.A: DNA Components
- Q6A student builds a model of a DNA strand. Which of these models of a DNA strand shows bases that are complementary to the ones on the student’s DNA model?45sB.6.A: DNA Components
- Q7The sequence of nitrogenous bases in DNA varies widely. The sequence of the bases in DNA is most important for which of the following?Providing the instructions for the traits of an organismPreventing mutations from occurring during DNA replicationHelping form the sugar-phosphate backbone of DNA moleculesAllowing the DNA to have the shape necessary for replication30sB.6.A: DNA Components
- Q8In 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 synthesismutation of nucleotide sequences in DNAdouble-helix structure of DNAsequence of DNA that makes up the human genome30sB.6.A: DNA Components
- Q9A model of a DNA molecule is shown below. The arrow indicates —the hydrogen bond between complementary nucleotidesthe junction of introns and exons in the sense strand of DNAthe bond between adjacent phosphate and deoxyribose moleculesthe junction of a codon and a DNA triplet30sB.6.A: DNA Components
- Q10Characteristics 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?Deoxyribose sugarsNitrogenous basesPhosphate groupsHydrogen bonds30sB.6.A: DNA Components
- Q11How does DNA in cells determine an organism’s complex traits?DNA separates into long single strands that make up each part of an organismDNA folds into the nucleus of each of the cells of an organismDNA contains codes for proteins, which are necessary for the growth and functioning of an organismDNA produces the energy an organism needs in order to grow30sB.6.A: DNA Components
- Q12Students are given data from an investigation that identified some of the chemical elements present in four different samples.Sample 2Sample 4Sample 3Sample 160sB.6.A: DNA Components
- Q13Which part of a DNA molecule is responsible for the direct coding of specific traits in an organism?The number of carbons in the DNA molecule.The sequence of nucleotide bases in the DNA molecule.The sequences of phosphates along each DNA strand.The number of hydrogen bonds that hold the strands of DNA together.60sB.6.A: DNA Components
