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In the accompanying image, a nucleotide is indicated by the letter _____.

You are watching: This is an image of a _____


This is an image of a(n) _____.


The letter A indicates a _____.

You can tell that this is an image of a DNA nucleotide and not an RNA nucleotide because you see a _____.


Which of these is(are) pyrimidines?

In a nucleotide, the nitrogenous base is attached to the sugar"s _____ carbon and the phosphate group is attached to the sugar"s _____ carbon.

In a DNA double helix an adenine of one strand always pairs with a(n) _____ of the complementary strand, and a guanine of one strand always pairs with a(n) _____ of the complementary strand.

Griffith"s experiments with S. pneumoniae were significant because they showed that traits could be transferred from one organism to another. What else did he find that was significant?


This is an image of a _____.

After allowing phages grown with bacteria in a medium that contained 32P and 35S, Hershey and Chase used a centrifuge to separate the phage ghosts from the infected cell. They then examined the infected cells and found that they contained _____, which demonstrated that _____ is the phage"s genetic material.

In the Hershey and Chase experiment that helped confirm that DNA, not protein, was the hereditary material, what was the key finding?

Which of the following enzymes is important for relieving the tension in a helix as it unwinds during DNA synthesis?

True or false? Single-stranded DNA molecules are said to be antiparallel when they are lined up next to each other but oriented in opposite directions.

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The researchers used strands of DNA located at the ends of chromosomes (called telomeres) to classify the cells they studied. What assumption did they make about telomeres?

The research showed that individuals who _______ had younger looking cells based on telomere measurements.