Paper 1&2 2023

Predict the outcome of crossing plants with the genotypes Ccrr and ccRr.

What to include when answering: Explain how kidney produces urine with a higher concentration of urea than blood plasma.

State the genotype of the F1 hybrids.

What property of water makes it possible for Water stiders with hydrophobic substance on legs to walk on water surface?

What to include when answering: Explain how plant cells originated by endosymbiosis.

What to include when answering the question: Explain how a new species can be formed abruptly by polyploidy.

What is an advantage of micropropagation?

What stage of spermatogenesis produces haploid cells from diploid cells?

Compare and contrast excretion in humans and unicellular organisms such as Paramecium.

Calvin experiment determines the biochemical details of photosynthesis. In what compound was radioactive carbon found?

4 electrical stimuli of increasing size are applied to a neuron at times t1 to t4. What can be concluded from the graph?

What are we getting in biology finals?

What occurs during skeletal muscle contraction?

Explain how living organisms ensure that the amino acid linked to this tRNA molecule is always aspartic acid.

If the genomes of the five new trees were sequenced, predict with a reason how similar they would be to each other.

How has the increased combustion of fossil fuels contributed significantly to global warming?

During translation, three binding sites for tRNA molecules are used. Outline how each of these binding sites is used.

The diagram shows a potometer. Under what weather conditions would the air bubble move fastest towards the shoot?

State the molecule that trees such as redwoods use as genetic material.

What would be INCORRECT answers to the question: Analyse the relationship between plants and their pollinators.

What happens in the transport of organic compounds in plants?

The diagram shows the DNA profile of two couples and two children.

What occurs during the first division of meiosis?

Deduce the function of bases CUG.

The table shows the approximate genome size of four species of organisms. What can be deduced from this information?

The image shows a model of a human heart with one chamber labelled R. Which statement is most accurate?

The starry thyme-moss and the badge moss are both bryophytes in the order Bryales. What must they have in common?

What enzyme removes the RNA primers and replaces them with DNA during DNA replication?

According to the respirometer readings during normal breathing what are the tidal volume and the ventilation rate?

Which plant would be described as a short-day plant?

The pyramid of energy shows the annual gross productivity for each trophic level. What does the pyramid show?