MCAT 2A · Bio/Biochem
Cells, Membranes and Tissues
386 original Anki flashcards, a 10-page illustrated study guide, a 4-page cheat sheet and 52 practice questions for MCAT content category 2A.
What is inside
- deck.apkg386 original Anki flashcards (215 short answer, 52 multiple choice, 49 cloze, 52 true/false, 18 image occlusion), 19 original diagrams
- guide.pdf10-page illustrated study guide that explains the ideas
- cheatsheet.pdf4 printable pages, US Letter at 100 percent
- questions.pdf52 original MCAT-style practice questions with explanations, including 3 passage-based sets
- README.txtimport steps
- 215 short answer
- 52 multiple choice
- 49 cloze
- 52 true/false
- 18 image occlusion
Topics (26)
- 01CeCell theory
- 02PlPlasma membrane composition and fluid mosaic model
- 03MeMembrane lipids and cholesterol effects
- 04MeMembrane proteins and glycocalyx
- 05PaPassive transport: diffusion and facilitated diffusion
- 06OsOsmosis and tonicity
- 07PrPrimary active transport (Na+/K+ ATPase)
- 08SeSecondary active transport
- 09EnEndocytosis and exocytosis
- 10MeMembrane potential and the Nernst equation
- 11GoGoldman equation
- 12CeCell junctions: tight, gap, desmosomes
- 13NuNucleus and nucleolus
- 14RiRibosomes and rough ER
- 15SmSmooth ER
- 16GoGolgi apparatus and protein sorting
- 17LyLysosomes and peroxisomes
- 18MiMitochondria and endosymbiosis
- 19CyCytoskeleton: microfilaments
- 20CyCytoskeleton: microtubules, cilia and flagella
- 21InIntermediate filaments
- 22EpEpithelial tissue types
- 23CoConnective tissue types
- 24CeCell signaling and receptors
- 25ApApoptosis
- 26ExExtracellular matrix
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Try it · sample practice questions
Five questions from the pack.
Q1A new antibiotic selectively blocks the 30S ribosomal subunit. Why is it relatively safe for human cells?
C. Prokaryotes have 70S ribosomes (50S + 30S). Eukaryotic cytosolic ribosomes are 80S (60S + 40S) and are not blocked. Human cells do have ribosomes, they are in the cytoplasm and on the ER, and drug entry is not the selectivity mechanism.
Q2A membrane permeable only to water separates 0.2 M glucose on the left from 0.1 M NaCl on the right. What happens?
A. NaCl gives two particles, so 0.1 M NaCl is 0.2 Osm, equal to 0.2 M glucose (0.2 Osm). With equal osmolarity there is no net water flow, so neither direction is favored. Solutes cannot cross, so NaCl does not move either.
Q3A mutation prevents the LDL receptor from binding clathrin adaptors. LDL will
C. The receptor still recognizes LDL, but clathrin-coated pit formation needs the adaptor interaction, so uptake fails. Binding is intact, so it does bind, internalization is not normal, and extracellular degradation is not a feature.
Q4Severe diarrhea occurs from a mutation that makes intestinal tight junctions leaky. The most likely explanation is
A. Tight junctions limit paracellular movement. When leaky, solutes and water pass between cells. Gap junctions do not seal the epithelium, hemidesmosomes anchor to the matrix, and endocytosis is unrelated.
Q5Which finding best supports the bacterial origin of mitochondria?
C. A circular genome and binary-fission-like division resemble bacteria. ATP production and widespread distribution do not show origin. Nuclear-encoded mitochondrial proteins reflect gene transfer, not an origin as such.
Those are real questions from the pack, word for word.