Bio First Test

Roy Hove
Flashcards by Roy Hove, updated more than 1 year ago
Roy Hove
Created by Roy Hove almost 6 years ago


biology flash cards

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A proteins Structure depends on on the physical and chemical conditions of the proteins environment eg : pH, salt concentration temperature and others)
Protein functions include structural support, storage, transport, cellular communications, movement, and defense against foreign substances
• Polypeptides are polymers built from the same set of 20 amino acids
8 types of proteins 1.Enzymatic 2.Structural 4.Transport 5. Horminal 6. Receptor 7.Contracile, motor 8.Defensive
Enzymes are chemical agents that selectively speed up chemical reactions without being consumed by the reactions
Amino acids are organic molecules with a carboxyl and an amino group
Amino acids differ in their properties due to differing side chains, called R groups
A functional protein consists of one or more polypeptides twisted, folded and coiled into a unique shape
Lysozyme present in our sweat, tears and saliva. It is an enzyme that helps prevent infection by binding to and destroying specific molecules on the surface of many kinds of bacteria
endorphins bind to specific receptors of brain cell in humans producing euphoria and relieving pain
Sickle-Cell Disease A Change in Primary Structure of hemoglobin
first step of Protein Folding in the Cell The unfolded polypetide enters the chaperonin from one end of the cylinder shape
Second step of Protein Folding in the Cell The cap attaches causing the cylindr to change shape in such a way that it creates an hydrophilic environment for the folding of the polypetide
Third Step of Protein Folding in the Cell The cap comes off and the properly folded protein is released
The two types of nucleic Acids Deoxyribonucleic acid (DNA) Ribonucleic acid (RNA
The amino acid sequence of polypeptides is programmed by by a unit of inheritance called gene.
Genes are made of DNA, a nucleic acid.
Explain the DNA --> RNA--> Protein process 1. Synthesis of mRNA in the nucleus 2.Mouvement of mRNA to cytoplasme via nuclear pore 3. Synthesis of protein by Ribosome
•Nucleic acids are polymers called polynucleotides
•Each polynucleotide is made of monomers called nucleotides
•Nucleotide consists of a nitrogenous base, a pentose sugar, and a phosphate group
The portion of the nucleotide without the phosphate group is called nucleoside
Name two types of nitrogeneous bases 1.Pyrimidines 2.Purines
Name two pyrimidines found in DNA 1. Cytosine 2. Thymine
Name two pyrimidines found in RNA 1.cytosine 2.Uracil
Name two purines found in dna and rna 1.Guanine 2. Adenine
Name the sugar found in DNA Deoxyribose
Name the sugar found in RNA Ribose
Que ce que L'hyperchromicité cest la propriété des polymères biologiques, et en particulier l'ADN et l'ARN, de voir leur absorption dans l'UV augmenter lorsqu'ils subissent une dénaturation, c'est-à-dire une perte de leur structure secondaire1
Originally, ethidium bromide (EB) found fame in the late 1940s as an an5trypanosomal, an5microbial, an5bacterial, and an5viral agent (1
(ethidium Bromide ) EB inhibits inhibits DNA polymerase and binds in vitro to both RNA and DNA.
DNA-EB binding mechanism led to the discovery that the drug (and many other related molecules) binds by a mechanism termed intercala5on
L’homme est le sexe hétérogamétique
La femme est le sexe homogamétique
Les liasons entre sucres dans les acides nucléiques est appelée liaison phosphodiester
Les riboses et des désoxriboses sont unis les une aux autres par Par des groupes phosphates
Quel acide nucléique inclut des riboses et désoxyriboses en proportion variable aucun ARN cellulaire inclut les 2 types de sucres
Dans les nucléotides la base azotée est liée au c1' du ribose
La dénaturation est une transition une transition brusque, pas progressive
Quelle molécule dont la fluorescence augmente quand elle est liée à l’ADN ne se lie pas au petit sillon de l’ADN ? Iodure de propidium
how many hydrogen bonds are there between adenine and thymine 2
how many hydrogene bonds are there between guanine and cytosine 3
Les agents intercalant se positionnent entre les bases
Donnez deux exemple du cours des agents intercalants bromure d’éthidium iodure de propidium
Donnez deux exemples d'agents qui se lient au petit sillion Exemples : 1. Hoescht 33258 2. SYBRgreen
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