GN 301 Homework 4 Central Dogma

The two strands of DNA are said to be ___ to each other since adenine is always across the molecule from thymine and cytosine is always across the molecule from guanine. Pick the best answer.

Complementary

The nucleotides along each strand of DNA are joined by ____ bonds.

phosphodiester

Is the helical coiling shown in this picture a right-handed or left-handed coil? (pictures differ)

Right-Handed Coil

X-ray diffraction experiments conducted by ____ led to the determination of the structure of DNA. Pick all that apply.

Wilkins, Franklin

There are ___ base pairs per turn in the Watson-Crick model of DNA.

10

The following is a small fragment of DNA. Only one strand is shown, but assume that the molecule is double-stranded. How many hydrogen bonds are present in this DNA molecule? Give your answer as a number without units so that Moodle can grade it correctly.

\
5' - GGCTAGG - 3'

19

The base composition of a double-stranded DNA molecule is 22% adenine. What percentage of this molecule is the base guanine? Give only the answer in numerical form so that Moodle will grade your answer correctly. Do not write "%".

28

The sequence of a template strand in a double-stranded DNA molecule is

5'- ATTGCCAA -3'. What is the sequence of the mRNA produced from this segment of DNA? Pick the best answer.

5'- UUGGCAAU -3'

This question refers to the mRNA sequence below:

5'-A A C G A A U A U G U U A A U C G U A G C C A C C U G G U U C A G C U A A G G U G A-3'

Which stop codon is used to terminate translation when the protein is produced from this mRNA? Fill in the blank with the correct codon without any spaces, and nothing else so that Moodle can grade this question correctly.

UAA

This question refers to the mRNA sequence below:

5' - A G C U G A U G G G C U G G U G C C G A G A A A G U U A G G U A A - 3'

What is the name of the sixth amino acid in the protein formed from this mRNA? Fill in the blank with the correct amino acid name, but nothing else so that Moodle can grade this question correctly.

NOT GAA- glutamic acid

Is the helical coiling shown in this picture a right-handed or left-handed coil? (blue one)

\n Right-Handed Coil

The base composition of a double-stranded DNA molecule is 26% adenine. What percentage of this molecule is the base guanine? Give only the answer in numerical form so that Moodle will grade your answer correctly. Do not write "%".

24

This question refers to the mRNA sequence below:

5' - C C G U A U G C A U U U C G G A C U U A G U A A G G A C U G A C A U A A -3'

As this mRNA is translated, the third codon is ______. Fill in the blank with the correct codon without any spaces, and nothing else, so that Moodle can grade your question correctly.

NOT GCA

This question refers to the mRNA sequence below:

5'-A A C G A A U A U G U U A A U C G U A G C C A C C U G G U U C A G C U A A G G U G A-3'

What is the name of the third amino acid in the protein formed from this mRNA? Fill in the blank with the name of the correct amino acid and nothing else so that Moodle can grade this question correctly.

NOT UAU- tyrosine

This question refers to the mRNA sequence below:

5'-A A C G A A U A U G U U A A U C G U A G C C A C C U G G U U C A G C U A A G G U G A-3'

What is the name of the sixth amino acid in the protein formed from this mRNA? Fill in the blank with the name of the correct amino acid and nothing else so that Moodle can grade this question correctly.

Threonine

This question refers to the mRNA sequence below:

5'-A A C G A A U A U G U U A A U C G U A G C C A C C U G G U U C A G C U A A G G U G A-3'

What is the name of the fourth amino acid in the protein formed from this mRNA? Fill in the blank with the name of the correct amino acid and nothing else so that Moodle can grade this question correctly.

Valine