chp 1 Flashcards
(24 cards)
wt are the building blocks of dna and rna ?
nucleotides
how do nucleotides work ?
they link together to form DNA and RNA
other than they are essential for dna and rna biosynthesis wt do they also do nucleotides?
energy transfer and cell signaling
DNA stands for what ?
deoxyribonucleic acid
wt do the dna do ?
stores genetic info and tells the cell how to make proteins
wt is the structure of dna ?
double helix , antiparallel strands ( on strand runs from 5 to 3 and the other 3 to 5 ) and the helix is right handed
how dna strands stick together ?
hydrogen bonds hold the bases together and hydrophobic interactions stabilize the structure
how many hydrogen bonds hold A and T ?
2
how many hydrogen bonds hold G and C ?
3
what do we call an organisms entire dna ?
genome
Rna stands for what ?
ribonucleic acid
RNA helps in making wt ?
protein synthesis
wt are the sugars we have in dna and rna ?
ribose sugar for rna and dna has deocyribose
in rna wt do we have instead of thymine ?
uracil
how is rna made ?
transcription
wt are three main types of rna ?
mrna , Rrna and Trna
wt does the mrna do ?
carries genetic instruction from DNA to Ribosomes
wt does the Rrna do ?
forms the ribosome , where proteins are made
what does the trna do ?
bring amino acids to the ribosome to build proetins
what helps the gene expression turn their genes on or off ?
special proteins called transcription factors
wdwm by autopoiesis ?
the ability to stay alive and function independently
your cells control their own processes like keeping ur body temp stable this is an example of wt ?
autopoiesis
