Back to the lesson and practice
PrintablePractice worksheet
Do it🖨️ On paper✏️ On screen
Layout1 column2 columns
Answer keyNoneAnswersWith steps
Questions10162430
LevelEasierMixedHarder
Print sizeNormalLarge print
New copyMake a new one

Free to print and copy for home or class. This link always prints the same sheet.

eurekami

9th grade cells, genetics and evolution

9th grade (Year 10 in England) · 16 questions · Common Core: NGSS.HS-LS3-2, NGSS.HS-LS3-3, NGSS.HS-LS1-4, NGSS.MS-LS3-2 · England: KS4 Combined Science: Evolution, inheritance and variation, KS4 Combined Science: Cell biology, GCSE Combined Science: Cell biology

Name

Date

Score/ 16

  1. Question 1

    Under the microscope, chromosomes are lined up across the centre of a cell. Which stage is this?

    • A. prophase
    • B. anaphase
    • C. metaphase
    • D. interphase

  2. Question 2

    Mitosis or meiosis? It used for growth and repair.

    • A. mitosis
    • B. meiosis

  3. Question 3

    Enzymes: which statement is NOT true?

    • A. Enzymes are biological catalysts.
    • B. Cold temperatures denature enzymes permanently.
    • C. Enzymes are not used up in the reactions they speed up.
    • D. Enzymes are proteins.

  4. Question 4

    A body cell of a fruit fly has 8 chromosomes. It divides by mitosis. How many chromosomes are in each new cell?

    Answer

  5. Question 5

    Catalase in liver broke down hydrogen peroxide and released 72 cm³ of oxygen in 60 s. What was the mean rate of reaction, in cm³/s?

    Answercm³/s

  6. Question 6

    How many cells are produced when one cell divides by meiosis?

    • A. 2, genetically different
    • B. 4, genetically identical
    • C. 2, genetically identical
    • D. 4, genetically different

  7. Question 7

    Stem cells: which statement is true?

    • A. Using embryos for research raises ethical issues that people disagree about.
    • B. Stem cell treatments have no risks.
    • C. Most specialised animal cells can change into any other type of cell.
    • D. Adult stem cells are only found in embryos.

  8. Question 8

    Tall stems (T) is dominant over short stems (t). Two parents with genotypes Tt and tt are crossed. What percentage of the offspring are expected to have short stems?

    Answer%

  9. Question 9

    What does "heterozygous" mean?

    • A. having no alleles
    • B. having two identical alleles, such as BB
    • C. having four alleles
    • D. having two different alleles of a gene, such as Bb

  10. Question 10

    A human enzyme has an optimum temperature of about 37 °C. What is the enzyme most likely to be doing at 38 °C?

    • A. working slowly, but not denatured
    • B. working at or near its fastest rate
    • C. denatured and no longer working

  11. Question 11

    Two Tt parents have 100 offspring. Tall stems is dominant. About how many offspring would you expect to have short stems?

    Answer

  12. Question 12

    Bone marrow transplants help some people with leukaemia (leukemia). Why?

    • A. Bone marrow contains antibiotics
    • B. Marrow cells kill all viruses
    • C. Adult stem cells in the marrow can make new healthy blood cells
    • D. The marrow becomes a new heart

  13. Question 13

    What is the probability (in %) that a baby will be biologically male (XY)?

    Answer%

  14. Question 14

    An enzyme was timed digesting the same amount of substrate at different pH values: pH 3: 117 s pH 5: 83 s pH 7: 34 s pH 9: 95 s pH 11: 133 s What is its optimum pH?

    Answer

  15. Question 15

    What is selective breeding?

    • A. animals choosing their own mates in the wild
    • B. cloning one plant
    • C. humans choosing parents with useful characteristics to breed
    • D. feeding animals more food

  16. Question 16

    What happens to an enzyme above its optimum temperature?

    • A. It is killed like a cell
    • B. It works faster and faster forever
    • C. Its active site changes shape and it is denatured
    • D. It turns into a different enzyme

All done? Color in the animal! · Free from eurekami.com/math

for the adult only

Answer key: 9th grade cells, genetics and evolution

  1. 1. C. metaphase

  2. 2. A. mitosis

  3. 3. B. Cold temperatures denature enzymes permanently.

  4. 4. 8

  5. 5. 1.2 cm³/s

  6. 6. D. 4, genetically different

  7. 7. A. Using embryos for research raises ethical issues that people disagree about.

  8. 8. 50 %

  9. 9. D. having two different alleles of a gene, such as Bb

  10. 10. B. working at or near its fastest rate

  11. 11. 25

  12. 12. C. Adult stem cells in the marrow can make new healthy blood cells

  13. 13. 50 %

  14. 14. 7

  15. 15. C. humans choosing parents with useful characteristics to breed

  16. 16. C. Its active site changes shape and it is denatured