COPY: Cell Organelles and Cytosol Quiz

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Which lipid molecule makes up about 75% of the membrane lipids?

Sphingolipids

Cholesterol

Glycolipids

Phospholipids (correct)

What is the classification of membrane proteins based on their embedding in the lipid bilayer?

Transmembrane or monolayer

Integral or peripheral (correct)

Unipolar or bipolar

Hydrophobic or hydrophilic

What is the predominant type of membrane protein that spans the entire lipid bilayer?

Transmembrane proteins (correct)

Glycoproteins

Transporters

Peripheral proteins

Which type of membrane proteins are not as firmly embedded in the membrane?

Peripheral proteins Signup and view all the answers

What do some integral proteins function as, forming pores that allow specific ions to flow through?

Ion channels Signup and view all the answers

What do carriers, also known as transporters, selectively move across the membrane?

Polar substances Signup and view all the answers

Which organelle is responsible for catalyzing glycolysis within the cytosol?

Endoplasmic reticulum Signup and view all the answers

What is the primary function of microfilaments in the cytoskeleton?

Cell movement Signup and view all the answers

Which component is NOT typically found in the cytosol of a cell?

Nucleic acids Signup and view all the answers

What is the approximate percentage of water in the cytosol?

75% Signup and view all the answers

In terms of diameter, which cytoskeletal element is the thinnest?

Microfilaments Signup and view all the answers

Which organelle is NOT directly involved in protein synthesis?

Mitochondria Signup and view all the answers

Which part of the cell is responsible for forming the cell's flexible outer surface?

Plasma membrane Signup and view all the answers

In the analogy presented, what does an organ correspond to?

A paragraph Signup and view all the answers

What is the main function of the digestive system?

Breaking down and absorbing food Signup and view all the answers

Which type of tissue is responsible for communication and coordination in the body?

Nervous tissue Signup and view all the answers

What does a system in the human body consist of?

Organs with common functions Signup and view all the answers

What is the structural framework of the plasma membrane called?

Lipid bilayer Signup and view all the answers

What is the main function of the Golgi complex?

Forming secretory vesicles for exocytosis Signup and view all the answers

How are the cisternae of the Golgi complex described?

As flattened membranous sacs with bulging edges Signup and view all the answers

What is the role of mitochondria in apoptosis?

They release chemicals like cytochrome c during cell death Signup and view all the answers

Which organelle is often referred to as the 'powerhouse' of the cell?

Mitochondria Signup and view all the answers

How do mitochondria respond to stimuli like DNA damage or growth factor deprivation?

By releasing chemicals like cytochrome c into the cytosol Signup and view all the answers

What is the primary function of the transport vesicles formed by the Golgi complex?

Carrying molecules to other organelles like lysosomes Signup and view all the answers

What initiates the cascade of activation of protein-digesting enzymes that bring about apoptosis in the cytosol?

Cytochrome c Signup and view all the answers

What is the function of the nuclear pores in the nuclear envelope?

Control movement of substances between the nucleus and cytoplasm Signup and view all the answers