Cell Biology Flashcards
What enzyme is used to cut open DNA?
Endonuclease (scissors)
What enzyme is used to ‘glue’ DNS back together?
Ligase
What can effect the rate of active transport?
Glucose concentration
Oxygen concentration
Temperature
What is respiration?
Chemical energy released in food by a series enzyme controlled reactions
Name uses of energy in cells
Muscle contraction
Cell division
Chemical reactions
Makes heat
Optimum levels for human enzymes?
37’C
Why is respiration irreversible in plants?
Carbon dioxide escapes and it drowns in the ethanol
Where is DNA found within a cell?
Nucleus
What is a gene?
Genes code for protein which determines the characteristics of the organism
What carried the genetic codes in the nucleus to ribosomes for protein synthesis
mRNA
What difference letter does mRNA use
U instead of T
What is ‘selectivity permeable’?
Allowed certain substances to pass into and out of the cell
How is fermentation reversible in animals?
When oxygen is once again present lactate is converted back into pyruvic acid
Name the stage of aerobic respiration and amount of energy needed
Glycolysis and 2 ATP
What is ATP when broken down to release energy
ADP + Pi, which needed energy to then form ATP