1) Adenine pairs with - a) Guanine b) Cytosine c) Thymine d) Uracil 2) Adenine pairs with - a) Guanine b) Cytosine c) Thymine d) Uracil 3) A pairs with - a) T b) G c) C d) A 4) G pairs with - a) T b) G c) C d) A 5) G pairs with -  a) T b) G c) C d) A 6) C pairs with - a) T b) G c) C d) A 7) One strand of DNA has the bases ATGC. What is the complementary strand? a) AAGC b) ATGC c) TACG d) TAUC 8) What is the complementary DNA strand for the sequence GCATT? a) CGTAA b) CGATT c) CCCGA d) CGTAT 9) Given the DNA sequence ACAC, what is the complementary strand? a) TGTG b) CGCG c) ACAC 10) DNA is - a) double stranded b) single stranded c) triple stranded 11) A and T are connected by - a) ionic bonds b) hydrogen bonds c) metallic bonds d) phosphates 12) Guanine (G) and Cytosine (C) are connected by - a) ionic bonds b) hydrogen bonds c) metallic bonds d) phosphates 13) The three parts of a nucleotide -  a) Nucleic acid b) Phosphate group c) Enzyme head d) Sugar e) Hydrogen bond f) Nitrogen base 14) The three parts of nucleotide -  a) Nucleic acid b) Phosphate group c) Enzyme head d) Sugar e) Hydrogen bond f) Nitrogen base 15) What parts of the DNA molecule are bonded (connected) to the adenine (A)? a) Thymine b) Adenine c) Guanine d) Phosphate group e) Deoxyribose sugar 16) The backbone (sides) of the DNA are made of - a) Thymine b) Adenine c) Guanine d) Phosphate group e) Deoxyribose sugar 17) The sides of the DNA are called the -  a) amino acid b) DNA backbone c) sugar-phosphate backbone d) nucleic acid backbone 18) The sides of the DNA are called the -  a) amino acid b) DNA backbone c) sugar-phosphate backbone d) nucleic acid backbone 19) Part of DNA that codes for traits - a) W b) X c) Y d) Z 20) Deoxyribose sugar -  a) W b) X c) Y d) Z 21) Phosphate group -  a) W b) X c) Y d) Z 22) Nitrogen base -  a) W b) X c) Y d) Z 23) Adenine, Guanine, Cytosine, and Thymine are called -  a) phosphate groups b) nitrogen bases c) ribose sugars d) deoxyribose sugars 24) The molecule in this image is a - a) codon b) base pair c) nucleotide d) amino acid 25) In DNA, the function of hydrogen bonds is  a) to code for proteins b) to separate the strands c) to synthesize proteins d) to connect the base pairs

DNA Structure Practice Questions

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