Unit 2 quiz Flashcards
Which of the following is the driving force for active transport?
ATP hydrolysis
What is ATP hydrolysis
Adenosine triphosphate or ATP is the energy currency of the cell. ATP hydrolysis releases the energy present in the high-energy terminal phosphate bonds, which is utilised to carry out various cellular reactions, such as muscle contraction, carbon fixation, etc.
Animal cells contain cell junctions called desmosomes.
True
Active transport moves substances either into or out of the cell / organelle __________ its concentration.
against
Which of the following describes a difference between phagocytosis and pinocytosis?
Phagocytosis is the intake of large particles or other cells, while pinocytosis is the intake of small amounts of liquid
__________ junctions prevent substances from moving through spaces between cells.
Tight
Microtubules are composed of the protein __________ .
Tubulin
The sodium-potassium pump is an integral membrane glycoprotein that is found in all animal cells and is involved in the facilitated diffusion of sodium and potassium ions.
False
Animal cells contain cell junctions called desmosomes.
True
Gap junctions in animal cells
Are membrane lined channels allowing substances to pass between cells
In general, the hydrolysis of ATP drives cellular work by __________.
releasing free energy that can be coupled to other reactions
A(n) __________ reaction converts ATP into ADP and Pi.
catabolic
Potential energy can be converted into kinetic energy, which does work.
True
What molecule is pictured?
adinosine triphosphate
Phosphorylation of ADP to ATP is endergonic, whereas the hydrolysis of ATP to ADP is exergonic. The two reactions are therefore said to be
coupled.
