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DSEE 🇹🇿 NECTA ✓ Official NECTA answers

Biology · Paper 1 · 2001

18 questions

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Questions (18)

Section A

1. 0 marks

Define mutation and give four types.

(a) Define mutation. 0 mk
(b) Give four types of mutation. 0 mk

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2. 0 marks

List four causes of soil infertility.

(none) List four causes of soil infertility. 0 mk

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3. 0 marks

State four adaptations of desert animals.

(none) State four adaptations of desert animals. 0 mk

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4. 0 marks

Give four functions of blood.

(none) Give four functions of blood. 0 mk

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5. 0 marks

List four methods for testing food samples.

(none) List four methods for testing food samples. 0 mk

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6. 0 marks

State four ways pathogens enter the human body.

(none) State four ways pathogens enter the human body. 0 mk

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7. 0 marks

Mention four roles of mitosis.

(none) Mention four roles of mitosis. 0 mk

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8. 0 marks

Give four features of good field-based Biology lessons.

(none) Give four features of good field-based Biology lessons. 0 mk

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9. 0 marks

List four differences between plant and animal cells.

(none) List four differences between plant and animal cells. 0 mk

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10. 0 marks

State four reasons for using peer assessment in teaching.

(none) State four reasons for using peer assessment in teaching. 0 mk

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Section B

11. 0 marks

Explain the process and stages of PCR in microbiology.

(a) Explain the process of PCR. 0 mk
(b) Describe the stages of PCR. 0 mk

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12. 0 marks

Discuss the carbon and oxygen exchange in ecosystems.

(none) Discuss the carbon and oxygen exchange in ecosystems. 0 mk

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13. 0 marks

Describe human endocrine regulation of calcium.

(none) Describe human endocrine regulation of calcium. 0 mk

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14. 0 marks

Explain the structure and functions of DNA.

(a) Explain the structure of DNA. 0 mk
(b) Explain the functions of DNA. 0 mk

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Section C

15. 0 marks

During field trip, wild animal scares learners and aborts lesson. Detail six safety, educational, and emotional follow-up steps.

(none) Detail six safety, educational, and emotional follow-up steps after a wild animal scares learners and aborts a field trip lesson. 0 mk

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16. 0 marks

A trainee teacher rushes through discuss and misses learning checks. Provide six reflective coaching points to improve pacing and assessment.

(none) Provide six reflective coaching points to improve pacing and assessment for a trainee teacher who rushes through discussions and misses learning checks. 0 mk

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17. 0 marks

Students report a classmate skipped peer feedback sessions. Outline six accountability and remediation strategies.

(none) Outline six accountability and remediation strategies when students report a classmate skipped peer feedback sessions. 0 mk

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18. 0 marks

Lab chemicals spill during enzyme investigation. Describe six immediate and long-term lab safety and procedural responses.

(none) Describe six immediate and long-term lab safety and procedural responses when lab chemicals spill during an enzyme investigation. 0 mk

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