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DNA Structure/PS/ Meiosis review
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Cells at the end of meiosis are haploid or diploid
haploid
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What are three nucleotides on an mRNA molecule that code for an amino acid called?
Codon
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Sperm and egg cells are called
gametes
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Chromosomes with the same genes (one from mom and one from dad) are
Homologous Chromosomes
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What is the name of the sugar found in DNA?
Deoxyribose Sugar
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What is Chargaff’s rule?
A=T & C=G
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Where does replication take place?
Nucleus
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What are the three nucleotides on a tRNA molecule called?
anti-codon
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What molecules is DNA “rewritten” into during transcription?
mRNA
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What is the function of DNA?
store and transmit genetic information and regulate the production proteins
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What are the three types of RNA?
mRNA, tRNA, rRNA
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What is it called when homologous chromosomes exchange pieces of genetic material?
crossing over
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How do proteins affect DNA and gene expression?
Turn genes on and off, wrap and unwrap DNA
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What starts transcription?
RNA polymerase bonding to promote
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What is the name given to the enzyme that unzips DNA?
Helicase
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In order for protein synthesis to occur, mRNA must migrate from the nucleus to
the ribosome
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Somatic cells have two sets of chromosomes so they are _____
Diploid
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Give 2 differences between DNA and RNA
1. 2 vs 1 strand. 2. Thymine vs Uracil. 3. Location 4. Sugar in each
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What are the three parts of a nucleotide?
Sugar, Phosphate, Nitrogen Base
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How many cell divisions happen in meiosis?
2
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