Transport across cell membranes - AQA A-level Biology | Take the Quiz

What is the primary function of carbohydrates in living organisms?

Provide energy

Build cell membranes

Store genetic information

Facilitate chemical reactions

What is the function of the nucleus in a cell?

Controls cell activities

Produces energy

Synthesizes proteins

Stores water

What is the main function of cell membranes?

Regulate the movement of substances in and out of the cell

Provide structural support to the cell

Store genetic information

Produce energy for the cell

What is the main function of lipids in living organisms?

Store energy

Facilitate cell communication

Provide structural support

Catalyze chemical reactions

What is the main function of the mitochondria in a cell?

Produces energy

Stores genetic information

Breaks down waste materials

Synthesizes lipids

Which of the following processes requires energy to move substances across the cell membrane against their concentration gradient?

Active transport

Passive transport

Facilitated diffusion

Osmosis

Which of the following is NOT a type of passive transport?

Endocytosis

Diffusion

Facilitated diffusion

Osmosis

Which organelle is responsible modifying lipids?

Smooth endoplasmic reticulum

Nucleus

Golgi apparatus

Lysosomes

Which of the following is a function of proteins in living organisms?

What is the basic structure of nucleic acids?

Nucleotides

Amino acids

Monosaccharides

Fatty acids

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

Modifies and packages proteins

Produces energy

Stores genetic information

Synthesizes lipids

Which of the following statements about osmosis is correct?

Osmosis is the diffusion of water across a selectively permeable membrane

Water moves from an area of lower solute concentration to an area of higher solute concentration

Osmosis can cause cells to shrink or swell depending on the surrounding solution

Osmosis requires energy expenditure by the cell

Which of the following is NOT a component of the cytoskeleton?

Mitochondria

Microtubules

Intermediate filaments

Microfilaments

Which of the following is not a type of RNA?

Messenger RNA (mRNA)

Transfer RNA (tRNA)

Ribosomal RNA (rRNA)

Deoxyribonucleic acid (DNA)

What is the function of ATP in living organisms?

Provide energy for cellular processes

Serve as a structural component of cell membranes

Store genetic information

Facilitate protein synthesis

What is the function of lysosomes in a cell?

Breaks down waste materials

Produces energy

Synthesizes proteins

Stores water

What is the purpose of aquaporins in cell membranes?

Facilitate the rapid movement of water molecules across the cell membrane

Regulate the movement of ions in and out of the cell

Provide structural support to the cell membrane

Store genetic information

Which of the following factors affect the rate of diffusion across a cell membrane?

Which organelle is responsible for photosynthesis in plant cells?

Chloroplasts

Nucleus

Golgi apparatus

Lysosomes

Which of the following is a characteristic of enzymes?

They are catalysts

They lower activation energy

They are consumed in reactions

They are specific to a particular substrate

They are unaffected by temperature and pH

What is the structure of a phospholipid?

Hydrophilic head and hydrophobic tail

Hydrophobic head and hydrophilic tail

Hydrophilic head and hydrophilic tail

Hydrophobic head and hydrophobic tail

What is the function of the cell membrane?

Controls the movement of substances in and out of the cell

Produces energy

Synthesizes proteins

Stores water

What happens to a red blood cell when placed in a hypertonic solution?

It shrinks or crenates

It swells and may burst

It remains unchanged

It undergoes endocytosis

Which organelle is responsible for storing genetic information in a cell?

Nucleus

Ribosomes

Mitochondria

Lysosomes

What is the primary structure of a protein?

Sequence of amino acids

Three-dimensional folding pattern

Interactions between multiple polypeptide chains

Presence of alpha helices and beta sheets

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