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30 Cards in this Set

  • Front
  • Back
An RNA molecule consists of how many strands of nucleotides?
one
A DNA molecule consists of how many stands of nucleotides?
two
What are the uprights on the spiral ladder?
nucleoties
The sequence of N-Bases form _________ of ladder: Genetic Code.
rungs
Genetic code for one protein?
Gene
A double strand (helix) of nucleotides that is the genetic code in the chromomes of cells ?
DNA
A gene is the sequence of bases that is the code for one protein?
DNA
A single strand of nucleoties formed as a complementary copy of a gene in the DNA is?
mRNA (messenger RNA)
Contains the triplet code: three bases is the code for one amino acid ?
mRNA (messenger RNA)
__________ leaves the DNA in the nucleus, enters the cytoplasm of the cell, and becomes attached to ribosomes.
mRNA (messenger RNA)
The cell organelles that are the site of protein synthesis?
Ribosomes
___________ attach the mRNA molecule.
Ribosomes
___________ contain enzymes to form peptides bonds between the amino acids.
Ribosomes
_____________________ picks up amino acids (from food) in the cytoplasm and transports them to their proper sites(triplets) along the mRNA molecule.
tRNA (transfer RNA)
A protein is made of the smaller molecules called ___________.
amino acids
Two identical cells are produced in the process in what cell division?
Mitosis
One cell with the diploid (the usual # 46)number of chromosomes divides ONCE?
Mitosis
Four cells are produced in the process in what cell division?
Meiosis
One cell with the diploid (usual # 46)number of chromosomes divides twice?
Meiosis
Each cell produced has the haploid (usual # 46) number of chromosomes?
Meiosis
The cells produced are egg or sperm cells?
Meiosis
The cells produced are needed for the growth and repair of tissues?
Mitosis
Each cell produced has the diploid(usual # 46) number of chromosomes?
Meiosis
Genetic disease - a mistake in the ___________ code.
DNA
Uncontrolled cell division means __________ cell division.
Abnormal
Haploid number means:
Half the usual number (23)
In abnormal cell division, _______ does not when when contact is made to normal cells.
Mitosis
Mutation means:
Genetic change, causes malignant cell.
Environmental substances that cause mutations are called:
Carcinogens; cigarette smoke, ultraviolet light, certain viruses.
__________________ is a hereditary disorder, one that may be passed from generation to generation.
A genetic disease