Session 1-intro To Cell Flashcards
What does the cytoplasm do?
Metabolism of carbs, amino acids and nucleotides
Fatty acid synthesis
Lysosomes function?
Cellular digestion
ER function?
Export proteins Membrane synthesis Lipid and steroid synthesis (SER) Detox reactions Protein synthesis
What two functions do both the ER and Golgi share?
Detoxification reactions
Export of proteins
Nucleus function?
DNA synthesis and repair
Nucleolus function?
RNA processing and ribosome assembly
What organisms are eukaryotic?
Plants, animals and fungi
Prokaryotic organisms?
Bacteria
What cell components do eukaryotic animal cells not contain?
Cell wall
What cell components do prokaryotes not contain?
Nucleus, ER, lysosomes, Golgi, vacuoles, mitochondria,
What bonds are involved in macro molecular structures?
Non covalent hydrogen,ionic,hydrophobic and Philic, van der waals
What is pk?
The stronger the tendency of an acid to dissociate, the lower the pka value
What happens when the ph is higher than the pka value?
Deprotonation of side chains on amino acids
What happens when the ph is lower than the pka value?
Protonation of side chains on amino acids
What is pI?
The isoelectric point-point at which ph has no overall charge
Is there rotation about a peptide bond?
No, due to double bond characteristics
What orientation are the amide hydrogen and carbonyl oxygen in?
Trans
What does the Golgi apparatus do?
Export proteins
Detoxification reactions
Give examples of roles of proteins.
- catalysts-enzymes
- transporters (o2,Fe)
- structure (collagen)
- machine (muscle contraction)
- immune (immunoglobulin-antibodies)
- ion channel
- receptors (for hormones, neurotransmitter)
