aa few biology questions I need help with?

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10. Which base substitutes for thymine in RNA? (Full name, please) _________________

11. In Griffith’s experiments with Pneumococuus, what was the “transformation factor”?___________

12. If a DNA sample has 20% of A, what is the % of C? ________

13. In a single DNA strand, which chemical bond connects two adjacent

nucleotides? _______________________

14. In a double- helix DNA molecule, which chemical bond connects two bases of the opposite strands?________________________

15. Which of the following is a DNA sequence complementary to 5' AAATTTGGGCCC 3'?

(a) 5' AAATTTGGGCCC 3' (c) 5' CCCTTTGGGAAA 3'

(b) 5' TTTAAACCCGGG 3' (d) 5' GGGCCCAAATTT 3'

16. Which exactly atom is responsible for DNA being an acid? ______________________

Update:

17. Which of the following side groups are found in DNA’s nitrogenous bass?

(a) -NH2 (b) - SH (c) -CH3 (d) -PO4 (e) two of the above (f) none of the above

18. What is the negative charge (in water solution) of a DNA Molecule which is 1000 nucleotide pairs long

_______

19. How many atoms of carbon are there in the ring of thymine? ______

20. Which of the following chemical groups make up a nucleotide?

(a) A, C, T, G (c) sugar, base, phosphate

(b) D, N, A (d) thousand to millions of base pairs

2 Answers

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  • Anonymous
    1 decade ago
    Favorite Answer

    10. Uracil

    11. DNA

    12. 30%

    13. The backbone connecting the bases in a chain is covalently bonded.

    14. Hydrogen bonds

    15. D

    16. Hydrogen (don't ask me which one)

  • 1 decade ago

    10. Uracil (U)

    11. DNA

    12. 20% - A, therefore 20, T. So, 60% are G/C, so C must be 30%

    13. Covalent bond?

    14. Hydrogen bond

    15. D (notice that all sequences are 5'-3', so the sequences are reversed)

    16. Oxygen?

    Source(s): Ph.D. in Biology
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