FECLL- Intro to the living cell, Amino acids and protein

Question 1

define a living cell

Answer 1

cells make the fundamental units of all living things on earth
they take nutrients and free energy form their surroundings and make copies of themselves

Question 2

what is the smallest vs largest known cell

Answer 2

small - mycoplasma genitalium - 0.3 um

big - ostrich egg - 20cm

Question 3

what are the key universal features of all living cells

Answer 3

plasma membrane- phospholipid bi-layer - hydrophobic head, hydrophilic tail, proteins inserted into the membrane
exchange molecules with surroundings - take up sugars, amino acids, exchange ions
communication
genetic information
gene expression
protein synthesis
evolution form a common ancestor

Question 4

what are the organelles of eukaryotic cells

Answer 4

plasma membrane
golgi apparatus
lysosome secretory vesicles
mitochondrion
cytoplasm
centriole
cytoskeleton
SER
RER
nucleus
peroxisome

Question 5

explain the concept of life as a pattern in flux

Answer 5

molecules in living cells are constantly being exchanged

overall structure of organism remains the same but constituent molecules are constantly replaced

Question 6

define the concept of homeostasis

Answer 6

tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes