cell design Flashcards
The chemical unit or building block of protein
amino acid
Having two layers
bilayer
A chemical substance coming from an organism
biochemical
Rod-shaped structure contains the genes
chromosome
Causes the separation of the cytoplasm
cytokinesis
Segments of DNA contained on chromosomes
genes
Blood sugar used by the cells in the production of energy
glucose
A group of biochemicals including DNA and RNA
nucleic acid
Makes up the plasma membrane together with protein
phospholipid
Having slightly negative and positive charged ends
polar
A long chain molecule made up of amino acids
protein
The outer layer of a cell which acts as a gatekeeper to the cell is called the
plasma membrane
The primary function of the cell’s membrane is to:
selectively permit or restrict substances from entering or leaving the cell
The phospholipid molecule has two ends, the nonpolar __________ end and the polar ____________ end.
- Charged
2.Uncharged
The natural tendency of molecules to move from higher to lower concentrations is
diffusion
Of the five transport mechanisms, which one will the cell utilize if the substance being transported is insoluble?
facilitated diffusion
Why do O2 and CO2 pass through the plasma membrane?
they are nonpolar and soluble
Which statement(s) corresponds to cellular respiration?
O 2 diffuses passively and then is converted to CO 2
CO 2 diffuses passively out of the cell
what involves the transport of insoluble chemicals across the membrane with protein acting as the carrier.
active transport
When is facilitated diffusion necessary?
when the molecules are insoluble
Glucose will pass through a cell membrane with the aid of__________
protein
The energy required for the mechanism of “active transport” comes from:
the product of ATP decomposition
The concentration of Na+ within a cell is required to be ____________________ than the external concentration.
