Cell Structure and Function

The cell membrane is a selectively permeable barrier that controls the movement of substances into and out of the cell.

Mitochondria are the organelles responsible for cellular respiration, converting chemical energy from food into ATP.

Prokaryotic cells lack membrane-bound organelles, such as the endoplasmic reticulum, nucleus, or mitochondria.

Plant cells contain chloroplasts for photosynthesis and mitochondria for cellular respiration.

Centrioles are typically found in animal cells to assist in cell division, but they are generally absent in most plant cells.

Large central vacuoles are a characteristic feature of plant cells, providing structural support and storage; they are not found in animal cells.

Chloroplasts are the organelles in plant cells that capture light energy and convert it into chemical energy through photosynthesis.

Animal cells lack chloroplasts because they do not perform photosynthesis; they obtain energy by consuming organic matter.

The cell membrane is primarily composed of a phospholipid bilayer, which provides a flexible and selective barrier.

In eukaryotic cells, the nucleus serves as the control center and houses the cell's genetic material in the form of chromosomes.

Proteins synthesized in the rough endoplasmic reticulum are transported to the Golgi apparatus for modification, sorting, and packaging. The Golgi acts as the post office of the cell.

The cytoskeleton is a network of protein filaments that provides structural support and shape to the cell. It also plays a crucial role in cell movement and intracellular transport.

The nucleolus is a dense region within the nucleus where ribosomal RNA (rRNA) is synthesized and combined with proteins to begin ribosome assembly.

Ribosomes are the cellular machinery responsible for protein synthesis, or translation. They read mRNA sequences to assemble amino acids into polypeptide chains.

Nuclear pores are protein channels in the nuclear envelope that regulate the exchange of molecules, such as RNA and proteins, between the nucleus and the cytoplasm.

Lysosomes contain digestive enzymes that break down waste materials, cellular debris, and foreign substances. They are essentially the recycling centers of the cell.

Vacuoles are membrane-bound sacs used for storage of various substances, including water, nutrients, and waste products. In plant cells, the central vacuole is particularly large.

Both prokaryotic and eukaryotic cells contain cytoplasm, which is the jelly-like substance that fills the interior of the cell and houses the organelles or cellular machinery.

The nucleus is the membrane-bound organelle that protects and contains the cell's genetic material, DNA, in eukaryotic cells.