BS 161 EXAM 3 (ACTUAL EXAM) WITH
CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST 2024 ALREADY GRADED A+
What molecule within the photosystem II supplies electrons to the ETC?
- ANSWERS-Chlorophyll
What is the source of energy that provides the boost for electrons
during photosynthesis? - ANSWERS-light
CDKs are important in the regulation of the cell cycle. They carry out
their function by:
1) degrading cyclin proteins
2) adding phosphate groups to proteins
3) preventing the progression of one stage of the cell cycle to the next
4)removing phosphate - ANSWERS-Adding phosphate groups to
proteins
,Which major checkpoint delays the cell cycle when DNA replication is
incomplete?
1) G1 checkpoint
2) M checkpoint
3) G2 checkpoint G1, G2, and M checkpoints
4) G2 checkpoint - ANSWERS-G2 checkpoint
Which of the following is TRUE if a cell has a mutation in the p53 gene
such that the p53 protein is no longer able to be phosphorylated?
1) The kinase activity in the nucleus would decrease
2) the cell would arrest
3) the cell would proceed through the cell cycle even in the presence of
DNA damage
4) the amount of cytoplasmic p53 would increase - ANSWERS-The cell
would proceed through the cell cycle even in the presence of DNA
damage
Kinase - ANSWERS-an enzyme that catalyzes the transfer of a
phosphate group from ATP to a specified molecule.
CDK - ANSWERS-cyclin dependent kinase
, S phase - ANSWERS-The synthesis phase of the cell cycle; the portion of
interphase during which DNA is replicated.
M phase checkpoint - ANSWERS-chromosomes have attached to
spindle apparatus, chromosomes have properly segregated and MPF is
absent
Cytokinesis - ANSWERS-division of the cytoplasm to form two separate
daughter cells
G2 checkpoint - ANSWERS-The cell checks to make sure the DNA is
copied correctly
G1 checkpoint - ANSWERS-checks for cell size, nutrients, growth factors
and DNA damage
cell cycle - ANSWERS-series of events that cells go through as they grow
and divide
G protein - ANSWERS-A GTP-binding protein that relays signals from a
plasma membrane signal receptor, known as a G protein-coupled
receptor, to other signal transduction proteins inside the cell.
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