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by BlastRoom
Nucleotide parts, the double helix, and the base-pairing rules used to build a complementary strand.
#biology
40 questions
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Which three parts make up a single DNA nucleotide?
A single strand of DNA reads 5'-AGGTCA-3'. Which sequence is its complementary strand, written 5' to 3'?
Which term names a segment of DNA whose base sequence codes for one protein?
Which bonding holds the two strands of a DNA molecule to each other?
A sample of double-stranded DNA is 30% thymine. What percentage of the bases in the sample are cytosine?
The two sugar-phosphate backbones of a DNA molecule stay the same distance apart along the whole molecule. Which pairing of bases fits that constant width?
Three parts build every DNA nucleotide, but only one of them differs between the four kinds of nucleotide. Which part is it?
One strand of a DNA molecule reads 5'-CTTAGG-3'. Which sequence is the strand that pairs with it, written 5' to 3'?
A region of DNA rich in guanine and cytosine needs a higher temperature to separate into single strands than a region rich in adenine and thymine. Why?
Which list places these structures in order from smallest to largest?
A single strand of DNA reads 5'-GGCATTAC-3'. Which sequence is its complementary strand, written 5' to 3'?
A sample of double-stranded DNA is 18% guanine. What percentage of the bases in the sample are adenine?
If DNA is pictured as a twisted ladder, what are the two uprights made of?
X-ray data showed that a DNA molecule is the same width, about 2 nanometers, all the way along. What does that tell you about every rung of the helix?
A single strand of DNA reads 5'-TTGACCAG-3'. Which sequence is its complementary strand, written 5' to 3'?
DNA polymerase adds a new nucleotide to the end of a growing strand. Which bond does it form to attach it?
Which sugar is part of every DNA nucleotide?
During replication a template strand reads 3'-CCTAGGTA-5'. Which sequence is the new strand built along it, written 5' to 3'?
A double-stranded DNA molecule contains 1,000 bases in total, 200 of which are adenine. How many cytosine bases does it contain?
Before a cell divides, its DNA is wound tightly around histone proteins and packed into compact structures. What are those structures called?
A single strand of DNA reads 5'-AACCTTGG-3'. Which sequence is its complementary strand, written 5' to 3'?
A student's DNA model puts adenine opposite cytosine at one rung. What is wrong with that rung?
Which base appears in RNA but never in DNA?
Four samples were analyzed for base composition. Which result could NOT have come from double-stranded DNA?
A single strand of DNA reads 5'-GATTACA-3'. Which sequence is its complementary strand, written 5' to 3'?
Which bonding must stay intact for one strand of DNA to keep its bases in the correct order?
The purines are the bases with a double-ring structure. Which two bases of DNA are the purines?
One strand reads 5'-CAGGTT-3'. A student writes the partner strand as 5'-GTCCAA-3', but the correct answer is 5'-AACCTG-3'. What mistake did the student make?
Chargaff found that in the DNA of every species he tested, adenine was about equal to thymine and guanine about equal to cytosine. Which structural feature explains that result?
In any sample of double-stranded DNA, what is the combined percentage of adenine plus guanine?
Which name is given to the single repeating unit that is joined to the next one over and over to build a strand of DNA?
Which pair of single strands could join to form one double-stranded DNA molecule?
Boiling a DNA solution separates the two strands from each other, yet each strand comes out as one unbroken chain. What does that show about the two kinds of bonding in DNA?
In gel electrophoresis, DNA fragments move toward the positive electrode because the molecule carries an overall negative charge. Which part of each nucleotide gives DNA that charge?
A sample of double-stranded DNA is 40% cytosine. What percentage of the bases in the sample are thymine?
A rung of the DNA helix made from two pyrimidines would leave the two backbones closer together at that point than the other rungs do.
One strand of a DNA molecule reads 5'-CCGATG-3'. Which sequence, written 3' to 5', is its complementary strand?
Where do the nitrogenous bases sit in a DNA double helix?
A chemical is applied that destroys only the bonds between each deoxyribose sugar and the base attached to it. What is the immediate result?
Each chromosome in a human cell carries exactly one gene.
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DNA and RNA Compared
20 questions
