Free BACE Cells Questions and Answers 3

Question 1

What is the function of the Golgi apparatus in a eukaryotic cell?

Accepted Answer

To receive proteins from the ER, modify, sort, and package them for delivery to their final destinations

Answer

To perform oxidative phosphorylation and produce ATP

Answer

To synthesize lipids and detoxify harmful compounds

Answer

To degrade damaged organelles and macromolecules by autophagy

Question 2

What is the role of caspases in programmed cell death (apoptosis)?

Accepted Answer

Caspases are protease enzymes that execute the apoptosis program by cleaving specific cellular substrates

Answer

Caspases replicate DNA to ensure cell survival during stress

Answer

Caspases maintain the mitochondrial membrane potential to prevent cytochrome c release

Answer

Caspases are used to build the extracellular matrix during tissue repair

Question 3

In a eukaryotic cell, where does translation occur after a signal sequence on the ribosome-bound nascent peptide is recognized?

Accepted Answer

The ribosome is directed to the rough endoplasmic reticulum where the peptide is co-translationally inserted into the ER lumen

Answer

Translation moves to the nucleus where the DNA template is available

Answer

Translation pauses until the signal sequence is cleaved then resumes in the cytoplasm

Answer

The ribosome moves to the outer mitochondrial membrane for energy-dependent translation

Question 4

What is the purpose of contact inhibition in normal (non-transformed) cell cultures?

Accepted Answer

To stop proliferation when cells make contact with neighboring cells preventing overgrowth beyond a monolayer

Answer

To prevent microbial contamination when cell monolayers become dense

Answer

To maintain sterility by inhibiting bacterial cell-to-cell contact

Answer

To prevent cells from detaching from the culture flask surface

Question 5

What is the function of lysosomes in eukaryotic cells?

Accepted Answer

To degrade cellular waste, foreign particles, damaged organelles, and macromolecules using acid hydrolases

Answer

To synthesize cholesterol and phospholipids for the cell membrane

Answer

To generate metabolic energy through the citric acid cycle

Answer

To process mRNA transcripts before export to the cytoplasm

Question 6

Why is cell density important to monitor during bioprocessing in a bioreactor?

Accepted Answer

Cell density directly affects product yield, metabolite accumulation, oxygen demand, and overall process efficiency

Answer

Cell density determines the color of the culture which is used as a proxy for pH

Answer

Cell density determines which media formulation should be used for the culture

Answer

Cell density is monitored only to prevent mycoplasma contamination from spreading