Zadanie 1
Identify P and Q in this bacterial cell. A. P: membrane-bound nucleus; Q: lysosome B. P: nucleoid; Q: 70S ribosome C. P: mitochondrion; Q: storage vesicle D. P: folded chloroplast; Q: 80S ribosome
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Biology SL Paper 1, November 2022
Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 24 zadania z tego arkusza, razem 24 punkty, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Osmotic effects on cells without walls (2), Evaluating biological evidence and methods (2), Inheritance as a requirement for selection response (2).
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Dodaj cały arkusz do zestawuZadanie 2
A freshwater protist is placed in distilled water. Short arrows show water movement and longer horizontal arrows show the sequence of stages. Which life function is illustrated by this cycle? A. Protein digestion B. Reproduction C. Homeostatic regulation D.…
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Zadanie 3
A freshwater protist is placed in distilled water. Short arrows show water movement and longer horizontal arrows show the sequence of stages. The protist is moved to a solution that is still hypotonic to its cytoplasm but less dilute than distilled water. What…
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Zadanie 5
In a model investigation, lipids extracted from membranes are spread as a single molecular layer. The areas are shown. Which arrangement best accounts for the result and the contact of both membrane surfaces with water? Circles represent polar heads and paired…
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Zadanie 6
Which arrangement correctly shows the covalent connections among the three components of one DNA nucleotide? A. Base — phosphate — deoxyribose B. Phosphate — deoxyribose — base C. Phosphate — base — phosphate D. Deoxyribose — base — deoxyribose
Zadanie 7
Which process produces the molecule shown from its monomers? A. Hydrolysis joins two nucleotides B. Condensation joins three amino acids C. Condensation joins two fatty acids D. Hydrolysis joins three amino acids
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Zadanie 8
The model contains only water molecules. Solid lines are covalent bonds; dashed lines represent attractions between molecules. Which property is not demonstrated? A. Hydrogen bonding between molecules B. Unequal distribution of charge within a molecule C.…
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Zadanie 9
Three microbial amylases are compared using equal enzyme concentrations at the same temperature. Which conclusion follows from these constructed results? A. Q has the highest optimum pH B. P has its highest measured rate at pH 7 C. R is inactive at every…
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Zadanie 10
A DNA template triplet is written 3′–GAC–5′. Which tRNA anticodon pairs with the resulting mRNA codon? All answer triplets are written 3′ to 5′. A. CUG B. GAC C. GUC D. CTG
Zadanie 11
DNA strands in a bacterial population initially contain only heavy nitrogen. The bacteria then replicate twice using only light nitrogen. In the density-gradient diagrams, all-light DNA forms the upper band, hybrid DNA the middle band and all-heavy DNA the…
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Zadanie 12
Which conclusion is supported by these absorption spectra? A. R absorbs more strongly than G near 540 nm B. G absorbs equally at all wavelengths C. R has no absorption at 480 nm D. The graph directly measures photosynthetic oxygen production
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Zadanie 13
Two inherited versions of the same gene occupy corresponding loci on homologous chromosomes. What distinguishes these alleles? A. Their nucleotide sequences can differ B. Each must occur on a different chromosome number C. One must be RNA and the other DNA D.…
Zadanie 14
Which change occurs during the first meiotic division of a diploid cell? A. Homologous chromosome pairs separate, reducing the number of chromosome sets B. DNA is duplicated for the second time since interphase C. Sister chromatids must separate before…
Zadanie 15
A family includes children with blood groups O, A and AB. Which parental genotype pair can produce all three phenotypes under the usual ABO model? A. IᴬIᴬ and Iᴮi B. Iᴬi and Iᴮi C. IᴬIᴮ and ii D. Iᴬi and ii
Zadanie 17
How does feeding by a woodlouse on leaf litter differ from saprotrophic feeding by a fungus? A. The woodlouse ingests material before digestion; the fungus digests externally before absorbing products B. Both must fix atmospheric carbon using light C. The…
Zadanie 18
A sealed illuminated model ecosystem contains a small plant and initially adequate water, air and mineral ions. Decomposers are excluded, while dead plant material accumulates over a long period. Which limitation would eventually result from the missing…
Zadanie 19
Which process directly fixes dissolved inorganic carbon into organic matter and can contribute to a net ocean carbon sink when it exceeds respiratory release? A. Respiration by fish B. Photosynthesis by phytoplankton C. Oxidation of dead organic matter D.…
Zadanie 20
A constructed survey finds that pale moths become more frequent after soot deposits on tree bark decline. Which explanation is consistent with natural selection? A. Every dark moth changes its inherited colour in response to cleaner air B. Pale moths become…
Zadanie 21
In a hypothetical island survey, two seed-eating bird populations are recorded alongside an insect-eating population. Which explanation could account for the restricted distribution of the thick-beaked population? Population | Island P | Island Q | Island R |…
Zadanie 24
A short protein segment is compared across five hypothetical vertebrate species. Which statement is supported by the sequences? Position | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 Species P | A | G | K | L | S | T | V | E Species Q | A | G | K | L | S | T | V | E Species…
Zadanie 27
Which processes can make pathogen control more difficult? I. Selection of antibiotic-resistant bacteria. II. Genetic changes producing new pathogen variants. III. Antibiotics acting as an effective treatment against every virus. A. I and II B. II and III C. I…
Zadanie 28
A model dataset tracks a marker of lung surfactant during fetal development. Using the graph, what difficulty could occur in a baby born at 30 weeks rather than at full term? A. Alveolar surfaces may adhere, making inflation more difficult B. Alveoli become…
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Zadanie 29
Body temperature varies within a regulated range, as in this model recording. Which hormone can influence temperature by altering metabolic heat production? A. Glucagon as the principal timing signal for sleep B. Thyroxin C. Leptin as the direct trigger of…
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Zadanie 30
Which labelled organ normally secretes the hormone used to stimulate development of multiple ovarian follicles during IVF treatment? A. R B. S C. T D. U
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