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Semester 2 vocab
vocab for final
59
Biology
10th Grade
06/05/2013

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Term
Aerobic
Definition
In the presence of oxygen
Term
Allele
Definition
One gene of a pair that determines a single trait (form of a gene, one letter)
Term
Anabolic
Definition
Reaction that builds complex molecules from simpler compounds
Term
Anaerobic
Definition
No oxygen present
Term
Anticodon
Definition
Sequence of 3 bases on a tRNA
Term
Apoptosis
Definition
programmed cell death
Term
Asexual reproduction
Definition
process of reproduction involving only a single parent,
Term
Bacteriophage
Definition
A kind of virus that infects bacteria
Term
Base pairing
Definition
In DNA, the fit between thymine and adenine and the fit between cytosine and guanine
Term
Blastocyst
Definition
stage of development that consist of hollow ball of cells
Term
Catabolic
Definition
Reaction that break down complex molecules
Term
Cellular respiration
Definition
process that releases energy by breaking down glucose in cells
Term
Cell cycle
Definition
Cell grows, prepares to divide, divides into 2 daughter cells
Term
Chromatin
Definition
strands of DNA tightly coiled around histones, makes up chromosomes
Term
Chromosomes
Definition
A thread like structure in the nucleus that contains genes
Term
Codominance
Definition
both alleles show together
Term
Codon
Definition
3 consecutive bases found on mRNA strand
Term
Cyclin
Definition
Proteins that help regulate the cell cycle
Term
Differentiation
Definition
cells become specialized in structure and function
Term
Diffusion
Definition
Movement of molecules from area of high concentration to area of low concentration.
Term
Dominant
Definition
A trait that will show itself whenever present in the gene makeup of an individual.
Term
Endergonic
Definition
Chemical reaction that requires an input of energy
Term
Eukaryote
Definition
A cell with a nuclear membrane surrounding the DNA
Term
Exergonic
Definition
Chemical reaction that releases energy
Term
Exons
Definition
segment of mRNA left after introns removed, codes for
Term
Fermentation
Definition
process of cells releasing energy from food without oxygen
Term
Gamete
Definition
sex cell
Term
Gene
Definition
A single unit of 2 alleles, responsible for transmitting
Term
Genetics
Definition
study of heredity
Term
Genotype
Definition
the genes you have (letters)
Term
Heterozygous
Definition
The paired genes for a particular trait are different
Term
Homozygous
Definition
The paired genes for a particular trait are identical
Term
Hypertonic
Definition
The concentration of solute inside the cell is higher
Term
Hypotonic
Definition
The concentration of solute inside the cell is lower than
Term
Incomplete dominance
Definition
both alleles show as a blend
Term
Introns
Definition
section of DNA not used for producing protein, the “junk”
Term
Lipid bilayer
Definition
double layer that makes up cell membranes
Term
Messenger RNA
Definition
single strand of RNA that carries the code from the DNA to the ribosome
Term
Multiple alleles
Definition
gene that has more than two alleles
Term
Multipotent
Definition
cell with potential to develop into the least variety of different types of cells
Term
Nucleus
Definition
structures that contains the cells DNA
Term
Osmosis
Definition
diffusion of water through a membrane
Term
Phenotype
Definition
How genes are expressed by an organism (looks like)
Term
Pluripotent
Definition
Cells that can develop into most but not all types of cells
Term
Polygenic traits
Definition
trait controlled by two or more genes
Term
Polypeptide
Definition
Amino acid chain, also called a protein.
Term
Promotors
Definition
region of a gene where transcription starts
Term
Prokaryote
Definition
A cell without a nuclear membrane surrounding the DNA
Term
Recessive
Definition
A trait that may be “masked” or dominated
Term
Replication
Definition
The process that copies the DNA molecule to make more DNA
Term
Ribosomal RNA
Definition
RNA that forms part of the ribosome
Term
RNA Polymerase
Definition
enzyme that helps make mRNA from DNA during transcription
Term
Stem cells
Definition
unspecialized cell that can become a specialized cell
Term
Totipotent
Definition
Stem cell that is able to develop into any type of cell
Term
Trait
Definition
characteristic of an individual
Term
Transfer RNA
Definition
RNA that carries an amino acid to a ribosome during translation
Term
Transformation
Definition
The process that can change a harmless bacteria to a disease causing bacteria
Term
Transcription
Definition
The process of making mRNA from DNA, happens in the nucleus
Term
Translation
Definition
The process of decoding the mRNA into a protein at the ribosome.
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