CELL BIOLOGY – EXAM 3 PRACTICE TEST
EXAM WITH CORRECT ACTUAL
QUESTIONS AND CORRECTLY WELL
DEFINED ANSWERS LATEST ALREADY
GRADED A+ 2025 - 2026
Which of the following proteins is a phosphatase?
Cdc25
Which signaling pathway uses secondary messengers?
G protein-coupled receptor (GPCR) pathway
When phosphorylated, which residue on cdc2 inactivates the kinase?
Tyr15
In the cell cycle arrest pathway, what modification is needed for p53?
Phosphorylation
Which protein is NOT needed to activate PKB in the insulin pathway?
PTEN
During which stage of Prophase I during meiosis is the synaptonemal complex
formed?
Zygotene
Which of the following is NOT a characteristic of p53?
, It is a necrosis gene
Which of the following is NOT true about Insulin-receptor substrates (IRS)?
They have an SH2 domain
What is not the result of the Ras-MAP Kinase pathway?
Apoptosis
During which stage of Prophase I during meiosis are the chromosomes
compacted?
Leptotene
In which stage of mitosis is the DNA condensed?
Prophase
Which of the following protein is heterotrimeric?
G protein
Which structural maintenance of chromosromes (SMC) proteins holds
together DNA within the same chromatid?
Condensin
What does a kinase do?
Phosphorylates
Where on the chromosomes do microtubules attach during mitosis?
Kinetochore
Which cells undergo meiosis?
Germline cells
PI3K is an important protein in the insulin pathway. What protein does it bind
to?
IRS
Which protein increases and decreases in concentration at different points in
the cell cycle?
EXAM WITH CORRECT ACTUAL
QUESTIONS AND CORRECTLY WELL
DEFINED ANSWERS LATEST ALREADY
GRADED A+ 2025 - 2026
Which of the following proteins is a phosphatase?
Cdc25
Which signaling pathway uses secondary messengers?
G protein-coupled receptor (GPCR) pathway
When phosphorylated, which residue on cdc2 inactivates the kinase?
Tyr15
In the cell cycle arrest pathway, what modification is needed for p53?
Phosphorylation
Which protein is NOT needed to activate PKB in the insulin pathway?
PTEN
During which stage of Prophase I during meiosis is the synaptonemal complex
formed?
Zygotene
Which of the following is NOT a characteristic of p53?
, It is a necrosis gene
Which of the following is NOT true about Insulin-receptor substrates (IRS)?
They have an SH2 domain
What is not the result of the Ras-MAP Kinase pathway?
Apoptosis
During which stage of Prophase I during meiosis are the chromosomes
compacted?
Leptotene
In which stage of mitosis is the DNA condensed?
Prophase
Which of the following protein is heterotrimeric?
G protein
Which structural maintenance of chromosromes (SMC) proteins holds
together DNA within the same chromatid?
Condensin
What does a kinase do?
Phosphorylates
Where on the chromosomes do microtubules attach during mitosis?
Kinetochore
Which cells undergo meiosis?
Germline cells
PI3K is an important protein in the insulin pathway. What protein does it bind
to?
IRS
Which protein increases and decreases in concentration at different points in
the cell cycle?
