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20 Cards in this Set

  • Front
  • Back
Components of nucleotide
Carbon, hydrogen, oxygen, nitrogen, and phosphorus atoms- a base, a simple sugar, and a phosphate group
Kinds of RNA
-mRNA- gets the instructions from DNA and Carries it to the ribosomes
-tRNA- brings in amino acids to the ribosomes, hooks to mRNA
-rRNA-makes up ribosomes
Where replication takes place and how
takes place in the nucleus- makes exact copies of entire chromosome
Where transcription takes place and how
takes place in nucleus- doesn't copy entire DNA, it is to get information to make proteins
Where translation takes place and how
takes place at the ribosomes in the cytoplasm
Frameshift mutations
Frameshift- involves the addition or deletion of a single base in a DNA molecule EX. The dog ate the cat, thd oga tet hec at
Point mutations
A change in a single base of the DNA molecule which affects the synthesis of an entire protein
1. substitution of bases within a letter code Ex. The dog atethe cat, the hog ate the cat
2. deletion or insertion of an entire 3 letter code Ex. The Dog ate the cat, the red dog ate the cat or the dog ate cat
Gene mutation vs chromosomal mutation
Gene mutation- a permanent change in the DNA sequence that makes up the gene
Chromosomal mutation- Mutations to chromosomes caused mostly by chromosomes breaking off and being lost during mitosis or meiosis or they break and rejoin incorrectly
Code
TAC (DNA)
Codon
AUG (mRNA)
anticodon
UAC (tRNA)
How many nitrogen bases needed to make a code
4
Compare and contrast DNA vs RNA
Structure:
-RNA is composed of a single strand of nucleotides, rather than double strands
-RNA has a different kind of sugar molecule, ribose
-Has 4 nitrogen bases but rather than thymine, RNA has uracil
How many different amino acids are there
20
mutagen and examples
causes the code to change- ionizing radiation such as ultraviolet light, gamma rays, and alpha particles
Transcription
Enzymes make an RNA copy of a DNA strand
Replication
Used everytime a cell reproduces by mitosis or gamete
centromere
the point on a chromosome by which it is attached to a spindle fiber during cell division
chromatid
each of the two threadlike strands into which a chromosome divides longitudinally during cell division. Each contains a double helix of DNA.
chromatin
the material of which the chromosomes of organisms other than bacteria (i.e., eukaryotes) are composed. It consists of protein, RNA, and DNA.