B2.2 Flashcards

Front

What substance is highly concentrated in the intermembrane space of mitochondria?

Back

Hydrogen ions

-OR-

protons

-OR-

H +1

Front

What is the benefit of having a large surface area of christae in cellular respiration?

Back

More space to embed enzymes for the electron transport chain, allowing more simultaneous chemical reactions to produce ATP.

Front

How does compartmentalization in the matrix benefit the Krebs cycle?

Back

It ensures that all enzymes and substrates needed for cell respiration are concentrated.

Front

What happens to the nucleus membrane during mitosis and meiosis?

Back

It breaks into vesicles and reforms the nucleus once the cell has divided.

Front

What is the function of pores in the nuclear membrane?

Back

They create a passageway for polar molecules, large molecules, and ions to pass in and out of the nucleus.

Front

How is the outer membrane of the nucleus related to the endoplasmic reticulum?

Back

The outer membrane is continuous with the endoplasmic reticulum.

Front

What is the role of free ribosomes in the cytoplasm?

Back

They produce proteins that the cell will use.

Front

Free ribosomes produce proteins that the cell will use, including histones, topoisomerase, helicase, DNA and RNA polymerases, transcription factors, and splicing factors. How do they get back into the nucleus?

Back

Through nuclear pores

Front

What is the role of bound ribosomes?

Back

They produce proteins that will be exported out of the cell.

Front

Through what process does the Golgi modify proteins?

Back

Glycosylation