DNA
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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Where is the chromosome found?
In the nucleus
What is a chromosome?
A rod of DNA that gives instructions
How many chromosomes from each of our parents?
23
What are genes?
Segments of DNA that give instructions by controlling the proteins
What is the shape for DNA called?
Double helix
What is the backbone of DNA?
Phosphate (P) and Sugar (S) makes up the side of the double helix.
What are the four nitrogen bases?
Adenine (A), Thymine (T), Cytosine (C), and Guanine (G)
True or False: Adenine is always paired with Cytosine
True
True or False: Cytosine is always paired with Guanine
True
How do mutations occur?
A change in a sequence of DNA (A with C instead of T)
How are insertion mutations caused?
Caused when one or more nitrogen bases are added to the DNA strand.
How are deletion mutations caused?
Caused when one or more nitrogen bases are deleted from the DNA strand.
How are substitution mutations caused?
Caused when one more nitrogen bases are replaced in the DNA strand.
True or False: Mutations are always to happen during replication.
False
With what could some mutations be triggered by?
Exposure to x-rays, ultraviolent light, radioactive materials, and some chemicals.
What is the process of copying a DNA molecule to make another DNA molecule called?
Replication
DNA nitrogen bases are read in groups of 3 to code for an _______.
Amino acid
The amino acids are linked together to make a ____.
protein