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L Sci-Ch 6 #2
study guide
Question | Answer |
---|---|
Explain the differences between genes and DNA. (ESSAY) | Genes tell you traits; DNA is more detailed - DNA makes up genes. |
What is made up of subunits called nucleotides? | DNA |
The 4 nucleotides of DNA are….. | adenine and thymine (A & T); and cytosine and guanine (C & G) |
The 4 nucleotides of RNA are…. | adenine and uracil (A & U); and cytosine and guanine (C & G) |
Determines how tall you are or whether your hair is curly or straight. | proteins |
Which pair of nucleotides in DNA pair together? | adenine and thymine; cytosine and guanine |
Which pair of nucleotides in RNA pair together? | adenine and uracil; cytosine and guanine |
Sugar, phosphate and nitrogenous base is called….? | a nucleotide |
Who discovered the adenine in DNA always equals the thymine? | Erwin Chargaff |
Who used x-ray diffraction to take first image of DNA? | Rosiland Franklin |
What does DNA look like? | a double helix (twisted ladder) |
Where is DNA found in the cell? | in nucleus/in bundles called chromosomes |
Explain the difference between RNA and DNA. (ESSAY) | RNA has one strand, DNA has two strands. RNA is a temporary copy of DNA |
What is RNA? | it is a mirror copy of DNA |
Three nitrogenous bases form... | codes for specific amino acids |
A mutagen is…... | physical or chemical agent that causes a mutation |
A mutation is…... | caused by a mutagen or random error |
Describe the insertion mutation | a base is added |
When scientists transfer individual genes from one organism to another. | genetic engineering |
What is the first step in making a protein? | RNA copying DNA |
Organelle where proteins are synthesized by mRNA and tRNA | ribosome |
String of nucleotides that gives cell information on how to make specific trait | gene |
Material is made of amino acids that causes most of the differences we see in organisms. | protein |
DNA is split down the middle during….. | replication |
Chemical parts that are transferred by tRNA and matched to mRNA | amino acids |
Makes up each nucleotide in a DNA molecule | sugar, phosphate, base |
Part of a chromosome | gene |