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Biology lab
bio
29
Biology
Undergraduate 1
04/22/2015

Additional Biology Flashcards

 


 

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Term
Binary Fission
Definition
  1.  is a form of asexual reproduction and cell division used by all prokaryotes (bacteria and archaebacteria) and some organelles within eukaryotic organisms 
Term
Enzymes
Definition
  1. are biological molecules (proteins) that act as catalysts and help complex reactions occur everywhere in life. 
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Term
Meiosis
Definition
  1.  cell division that results in four daughter cells 
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Term

Spirillum

 

Definition

 helically twisted bacterial cell often, Spirillium live in stagnant water.

Term
Red-green colorblindness
Definition
blindneess most common in men. inherited in X-
Term
Gram staining
Definition
  1.  technique used to differentiate two large groups of bacteria based on their different cell wall constituents. Gram positive and Gram negative groups by coloring these cells red or violet.
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Term
Zone of Inhibition
Definition
  1. If an antibiotic stops the bacteria from growing or kills the bacteria, there will be an area around the wafer where the bacteria have not grown enough to be visible. 

 

Term
PCR
Definition

 is a laboratory technique used to make multiple copies of a segment of DNA

 
Term
GRAM POSITIVE
Definition
bacteria take up the crystal violet stain used in the test, and then appear to be purple-coloured 
Term
ENERGY OF ACTIVATION
Definition
the least amount of energy required to activate atoms or molecules toa state in which they can undergo a chemical reaction.
Term
Genotype
Definition
  1.  genetic makeup of a cell, specific characteristic 
Term
POPULATION ECOLOGY
Definition
  1. dynamics of species populations and how these populations interact with the environment.the population sizes of species groups change over time and space.

Term
NUMBER OF TANDEM REPEATS
Definition

Polymeric sequences

 

Term
Gram negative
Definition
Gram-negative bacteria are a class of bacteria that do not retain the crystal violet stain used in the Gram staining method of bacterial differentiation, making positive identification possible
Term
Enzyme-substrate complex
Definition

The intermediate formed when a substrate molecule interacts with the active site of an enzyme. Following the formation of an enzyme–substrate complex, the substrate molecule undergoes a chemical reaction and is converted into a new product.

 
Term
phenotype
Definition
the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.
Term
Ecology
Definition

the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.

 
Term
Primer
Definition

short pre-existing polynucleotide chain towhich new deoxyribonucleotides can be added by dNA polymerase.

 

Term
Gel Electophresis
Definition
  1.  is a laboratory method used to separate mixtures of DNA, RNA, or proteins according to molecular size. In gel electrophoresis, the molecules to be separated are pushed by an electrical field through a gel that contains small pores.
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Term
Coccus
Definition
can be used to describe any bacterium that has a spherical, ovoid, or generally round shape. It is one of the three distinct bacterial shapes, the other two being bacillus and spiral-shaped cells.
Term
Genetic drift
Definition
random changes in the frequency of alleles in a gene pool, usually of small populations.
Term
Hominin
Definition
ape man
Term
Diploid
Definition

is a cell or organism that has paired chromosomes, one from each parent. In humans, cells other than human sex cells, are diploid and have 23 pairs of chromosomes. Human sex cells (egg and sperm cells) contain a single set of chromosomes and are known as haploid.

 
Term
Crossing Over
Definition

 is the exchange of genetic material between homologous chromosomes that results in recombinant chromosomes. It is one of the final phases of genetic recombination, which occurs during prophase I of meiosis during a process called synapsis.

 
Term
Mitosis
Definition

a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.

 
Term
Bacillus
Definition
is a genus of Gram-positive, rod-shaped, bacteria and a member of the phylum Firmicutes. Bacillus species can be obligate aerobes, or facultative anaerobes.
Term
Genetic Drift
Definition
  1.  allelic drift is the change in the frequency of a gene variant (allele) in a population due to random sampling of organisms.
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Term
Thermal Cycler
Definition
  1. also known as a thermocycler, PCR machine or DNA amplifier) is a laboratory apparatus most commonly used to amplify segments of DNA via the polymerase chain reaction (PCR).
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Term
Haploid
Definition
  1. is the term used when a cell has only one set of chromosomes. A normal eukaryote organism is composed of diploid cells, one set of chromosomes from each parent. However, after meiosis, the number of chromosomes in gametes is halved.
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