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BSC 101

Terms

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It takes _____ ____ to make up a human being.
30,000 genes
A gene contains the information needed to _____ a ___ molecule.
synthesize; protein
Transcription
DNA message is copied onto a strand of mRNA and taken from the nucleus to the cytoplasm
Translation
the base sequences of the tRNA match to the base sequences of the mRNA at the ribosome. The amino acids attatched to the tRNA form a protein growing chain.
The human genome consists of more than __ billion ____.
3; Bases
DNA makes up ___ which are segements that code for particular traits
genes
These segments are found on _________ which are made up of tightly _________.
chromosomes; coiled DNA
DNA -----> RNA ---> Protein

(1st arrow?)
(2nd arrow?)
transcription; translation
A particular sequence of __ bases codes for __ amino
3; 1
Amino acid sequence determines _____ ______ which determines _______ ______.
protein structure; protein function.
RNA is the bridge between ___ and ________ _______
DNA; protein synthesis
tRNA
transfers amino acid to make protein
different variations of genes are called
alleles
Genotype
actual gene
Phenotype
physical trait; what your gene does
Diploid
full set; 2n; 46 (23 pair)
Haploid
half set; 1n
Only __% of all DNA codes for proteins
2
Is DNA negative or positive?
Negative
3 Reasons why we have "junk" DNA
1. Better off we keep it
2. Maybe it coded old stuff we don't use
3. Evolved segments to prevent themselves from being eliminated.
DNA fingerprinting discovered in _____ by ___ ____ _______.
1984; Sir Alec Jefferys
________ are used to cut the DNA
Enzymes
In fingerprinting DNA, fragments are _______ labeled and _________.
radioactively; photographed
____ are the simplest organisms.
Viruses

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