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AP Biology Cell Structure — practice questions

25 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.

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All cells fall into one of two broad categories. They are eukaryotic and:Which two domains of life are made up of prokaryotes?Mitochondria are often called the powerhouses of the cell because they make:A group of similar cells working together is called:The three types of fibre that make up the cytoskeleton are microtubules, intermediate filaments and:The stack of thylakoids inside a chloroplast is called:Roughly what fraction of the cytoplasm is water?Electron microscopes differ from light microscopes because they use a beam of:As a cell grows larger, its surface area-to-volume ratio:Of all shapes, the one with the smallest surface area-to-volume ratio is:The nuclear envelope is built from:Unwound protein and chromosome complexes inside the nucleus are called:Inside a mitochondrion, the space surrounded by the folds of the inner membrane is the:The rough endoplasmic reticulum gets its name from:The receiving side of the Golgi apparatus is known as the:The narrowest fibres of the cytoskeleton are the microfilaments, which are built from:Junctions that connect neighbouring plant cells through the cell wall are called:The material cells secrete around themselves, holding a tissue together, is the:Structures found in plant cells but not in animal cells include chloroplasts, a large central vacuole and:Which pair of structures is found in animal cells but generally not in plant cells?Removing the centrosome from a cell shows that centrioles:Lysosomes can digest material because their internal pH is:Ranking the cytoskeletal fibres from narrowest to widest gives:A gap junction channel is built when six connexin proteins arrange into a structure called a:The earliest fossil evidence for life on Earth, microbial mats, dates back about: