Cell Biology Quiz

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What is a characteristic of passive transport?

Requires metabolic energy
Net movement occurs from higher to lower concentration (correct)
Involves cytosis
Molecules move from lower to higher concentration

Peripheral proteins penetrate the whole thickness of the cell membrane.

False (B)

What substances are primarily transported by facilitated diffusion?

Large size hydrophilic molecules like glucose and amino acids.

The _____ is formed of glycoprotein and glycolipids and plays a role in cell-cell recognition.

glycocalyx Signup and view all the answers

Match the type of transport with its characteristic:

Passive transport = Does not require energy Active transport = Requires energy for movement against the gradient Endocytosis = Process of engulfing substances into the cell Exocytosis = Process of expelling substances from the cell Signup and view all the answers

Which organelle is known as the powerhouse of the cell?

Mitochondria (C) Signup and view all the answers

The Golgi apparatus is involved in the production of proteins.

False (B) Signup and view all the answers

What is the primary function of the nucleus in a cell?

It controls the cell’s growth and reproduction and contains genetic material. Signup and view all the answers

The rough endoplasmic reticulum is primarily responsible for protein ______.

production Signup and view all the answers

Match the following organelles with their primary functions:

Nucleus = Transcription of RNA from DNA Lysosomes = Intracellular digestion Mitochondria = Energy production Golgi apparatus = Packaging and modification of proteins Signup and view all the answers

Which component is NOT part of the non-membranous organelles?

Mitochondria (A) Signup and view all the answers

Cholesterol in cell membranes serves to increase fluidity and transport substances.

True (A) Signup and view all the answers

Name one function of the smooth endoplasmic reticulum.

Gluconeogenesis in the liver or lipid transport. Signup and view all the answers

Passive Transport

Movement of molecules across a membrane from higher to lower concentration, without energy input.

Simple Diffusion

Movement of molecules from high to low concentration, without a carrier protein.

Facilitated Diffusion

Passive movement of molecules across a membrane with the help of a carrier.

Factors affecting diffusion rate

Surface area, membrane thickness, concentration gradient, and pore size affect how fast diffusion happens.