BIO 121 EXAM 4 UPDATED ACTUAL
Exam Questions and CORRECT Answers
simpler replication process - CORRECT ANSWER - Binary fission
FtsZ proteins form a ring that becomes the - CORRECT ANSWER - septum
Humans have ___ pair of chromosomes and ____ total - CORRECT ANSWER - 23 46
________ _________ provide much of chromosome structure - CORRECT ANSWER -
Scaffold Protein
DNA helix always wound around ______ - CORRECT ANSWER - histones
The chromosomes that make up a pair ________ ________ - CORRECT ANSWER -
homologous chromosomes
Full map of chromosomes is - CORRECT ANSWER - karyotype
When chromosomes replicate in preparation for division, the linked copies are ______ ______ -
CORRECT ANSWER - sister chromatids
M phase - - CORRECT ANSWER - mitosis and cell separation
Interphase - CORRECT ANSWER - G1 S1 G2
G1 - CORRECT ANSWER - primary growth phase
, S phase - CORRECT ANSWER - DNA replication
G2 - CORRECT ANSWER - Final growth phase before mitosis
In Prophase -Chromosome ___________ and become visible - CORRECT ANSWER -
condense
Cell spends great majority of existence in __________, if not entire existence - CORRECT
ANSWER - interphase
Lots of ________ synthesized at end of interphase - CORRECT ANSWER - tubulin
Many __________ needed for mitosis - CORRECT ANSWER - microtubules
To ensure that cells only divide when the conditions are correct, the ____ _____ has built-in
checkpoints - CORRECT ANSWER - cell cycle
___________ organisms have more variety in cyclins/Cdks, because they need to respond to
more complex signals - CORRECT ANSWER - Multicellular
Growth factors are a large family of molecules that when bound to their receptors, launch
______ ______ that lead to changes in cyclin and cdk levels, controlling the cell cycle. -
CORRECT ANSWER - signaling cascades
The protein signaling pathways are complex, but ___ is of note. When it is phosphorylated
(turned on), it can release ____ , which causes cyclin/cdk production passing of G1/S checkpoint
- CORRECT ANSWER - Rb (retinoblastoma) E2F
If Rb is mutated, however, it may never bind to E2F at all -> E2F is always ____ -> too many
cyclins, too many Cdks -> ____ - CORRECT ANSWER - free cancer
Exam Questions and CORRECT Answers
simpler replication process - CORRECT ANSWER - Binary fission
FtsZ proteins form a ring that becomes the - CORRECT ANSWER - septum
Humans have ___ pair of chromosomes and ____ total - CORRECT ANSWER - 23 46
________ _________ provide much of chromosome structure - CORRECT ANSWER -
Scaffold Protein
DNA helix always wound around ______ - CORRECT ANSWER - histones
The chromosomes that make up a pair ________ ________ - CORRECT ANSWER -
homologous chromosomes
Full map of chromosomes is - CORRECT ANSWER - karyotype
When chromosomes replicate in preparation for division, the linked copies are ______ ______ -
CORRECT ANSWER - sister chromatids
M phase - - CORRECT ANSWER - mitosis and cell separation
Interphase - CORRECT ANSWER - G1 S1 G2
G1 - CORRECT ANSWER - primary growth phase
, S phase - CORRECT ANSWER - DNA replication
G2 - CORRECT ANSWER - Final growth phase before mitosis
In Prophase -Chromosome ___________ and become visible - CORRECT ANSWER -
condense
Cell spends great majority of existence in __________, if not entire existence - CORRECT
ANSWER - interphase
Lots of ________ synthesized at end of interphase - CORRECT ANSWER - tubulin
Many __________ needed for mitosis - CORRECT ANSWER - microtubules
To ensure that cells only divide when the conditions are correct, the ____ _____ has built-in
checkpoints - CORRECT ANSWER - cell cycle
___________ organisms have more variety in cyclins/Cdks, because they need to respond to
more complex signals - CORRECT ANSWER - Multicellular
Growth factors are a large family of molecules that when bound to their receptors, launch
______ ______ that lead to changes in cyclin and cdk levels, controlling the cell cycle. -
CORRECT ANSWER - signaling cascades
The protein signaling pathways are complex, but ___ is of note. When it is phosphorylated
(turned on), it can release ____ , which causes cyclin/cdk production passing of G1/S checkpoint
- CORRECT ANSWER - Rb (retinoblastoma) E2F
If Rb is mutated, however, it may never bind to E2F at all -> E2F is always ____ -> too many
cyclins, too many Cdks -> ____ - CORRECT ANSWER - free cancer
