Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 16 zadań z tego arkusza, razem 16 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Organization of a eukaryotic cell (2).
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Dodaj cały arkusz do zestawuA eukaryotic cell contains a nucleus next to its rough endoplasmic reticulum. Which description applies to the nucleus? A. DNA associated with proteins is enclosed by two membranes B. Cristae surround the cell’s principal site of ATP production C. Stacked…
A unicellular ciliate is observed enclosing smaller living cells in food vacuoles and digesting them. What does this observation demonstrate? A. No single cell can digest food B. The ciliate obtains nutrition heterotrophically C. The ciliate must lack…
Compare a bacterial cell with a typical animal cell. Which contrast is valid? A. Only the bacterium has ribosomes B. Only the animal cell contains hereditary DNA C. Both must have a cellulose cell wall D. The animal cell has membrane-bound internal…
Temperature is held constant while plants are tested at two light intensities. At 0.12% CO₂ under dim light, which change is supported as a way to increase photosynthesis by the results? A. Conclude that no environmental factor limits the rate B. Increase…
During a brief, vigorous sprint, how can a human muscle cell supplement its aerobic ATP supply? A. By releasing oxygen from carbon dioxide B. By ceasing ATP production until oxygen supply catches up C. By forming lactate, allowing rapid glycolytic ATP…
Which combination correctly distinguishes DNA and RNA while identifying a base common to both? A. DNA: deoxyribose; RNA: ribose; shared base: guanine B. DNA: ribose; RNA: deoxyribose; shared base: cytosine C. DNA: deoxyribose; RNA: ribose; shared base: thymine…
What does DNA polymerase do while a DNA molecule is copied? A. It joins DNA nucleotides into the new complementary strand B. It replaces every base in the unchanged template with an amino acid C. It joins amino acids on a ribosome D. It converts the parental…
The model pedigree shows a fully penetrant condition caused by a dominant allele. Assume no new mutations. Which observation excludes X-linked dominant inheritance? A. Both sexes occur in the family B. Unaffected V-1 has two unaffected parents C. The affected…
A laboratory prepares a DNA profile from a very small sample. During which stage is PCR used? A. Amplifying selected DNA regions to obtain many copies B. Separating fragments by their movement through a gel C. Breaking open cells to release their contents D.…
Over many generations, what allows a largely self-sustaining forest ecosystem to retain its biological activity? A. Nutrients can be reused only if energy is also recycled B. Elements are recycled while energy is continually supplied and ultimately dissipated…
Which description fits an ecological community in a woodland? A. Interacting populations of different species in the same ecosystem B. Only individuals of one species and one age C. Only organisms feeding at the same trophic level D. A population in which each…
Two descendant bird lineages evolve different feeding structures. Which statements can explain this divergence? I. Heritable beak variation was available in the ancestral population. II. Beak wear acquired by an individual is necessarily inherited by its…
Why can an antibiotic selectively inhibit a susceptible bacterial pathogen? A. It interferes with a bacterial process that differs from or is absent in human cells B. It directs human antibodies to bind every virus C. It stops mitosis as the bacterium’s method…
Which capillary adaptation most directly allows exchange between blood and surrounding tissues? A. A very thin permeable wall B. An impermeable lining that prevents dissolved molecules leaving the blood C. A wall made of several layers of calcified cells D.…
A mixed triglyceride contains both saturated and unsaturated fatty-acid residues. Which set of the displayed molecules could occur among its complete hydrolysis products? A. M, N and O B. K, L and M C. L and O only D. N alone
Which pancreatic response helps correct a fall in blood glucose? A. Conversion of its digestive enzymes into glucose receptors B. Greater glucagon secretion C. Greater thyroxine secretion D. Insulin secretion specifically to raise blood glucose
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