Lesson 6.2.1a
6.2.1a Natural and artificial cloning Quiz: OCR Biology, Unit 8
20 questions
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Lesson 6.2.1a, Natural and artificial cloning: 20 multiple choice questions for the OCR Biology (H020), Unit 8: Cloning and biotechnology, written with Revision Ninja.
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The 20 questions
-
Which structure is used by strawberry plants for natural vegetative propagation?
- Rhizomes
- Bulbs
- Runners
- Tubers
-
Which term describes a section of stem removed to produce a cloned plant?
- Explant
- Runner
- Scion
- Cutting
-
Which of the following is a natural example of animal cloning?
- Monozygotic twins
- Fraternal twins
- Dizygotic twins
- Parthenogenesis
-
What is transferred into an enucleated egg cell during SCNT?
- Haploid egg nucleus
- Somatic cell nucleus
- Mitochondrial DNA
- Sperm cell nucleus
-
Which mammal was the first to be cloned from an adult body cell?
- Cumulina the mouse
- CC the cat
- Dolly the sheep
- Prometea the horse
-
What is the small tissue sample removed from a parent plant for micropropagation called?
- An explant
- A callus
- A cutting
- A runner
-
What is the main risk of growing a crop composed entirely of plant clones?
- High disease susceptibility
- Reduced crop yield
- Slow growth rate
- Unpredictable fruit size
-
How do plant cuttings compare genetically with the parent plant?
- Genetically identical
- Genetically distinct
- Haploid variants
- Polyploid hybrids
-
What is a major commercial advantage of growing cloned crops?
- Increased genetic diversity
- Faster mutation rate
- Uniform crop yield
- Greater pest resistance
-
Identical twins arise naturally from which initial event?
- One unfertilised egg
- One fertilised egg
- Two sperm cells
- Two fertilised eggs
-
Why is the egg cell enucleated before inserting the donor nucleus in SCNT?
- Induce mitotic cleavage
- Increase cytoplasm volume
- Remove egg DNA
- Double chromosome number
-
Which feature is unique to micropropagation compared to taking plant cuttings?
- Mitotic cell division
- Sterile tissue culture
- Rooting in soil
- Production of clones
-
Which plant tissue is cultured in micropropagation to produce virus-free plants?
- Meristem tissue
- Epidermal tissue
- Phloem tissue
- Xylem tissue
-
What is a primary benefit of artificially cloning rare animal species?
- Increasing genetic variation
- Preventing cellular ageing
- Eliminating all diseases
- Preserving endangered species
-
What is a main health concern associated with cloned animals?
- Increased fertility
- Enhanced immunity
- High genetic diversity
- Premature ageing
-
What is the main risk of growing a crop produced entirely by cloning?
- Low crop yield
- Slow growth rate
- High disease vulnerability
- Excess genetic variation
-
A micropropagation process multiplies plantlets fourfold at each subculture, starting with 5 plantlets. How many plantlets after 3 subcultures?
- 20
- 320
- 60
- 1280
-
Why is somatic cell nuclear transfer usually inefficient?
- Rapid cell division
- Excessive ATP production
- Incomplete nuclear reprogramming
- Instant cell lysis
-
What type of clones are identical twins formed by natural embryo splitting?
- Natural monozygotic clones
- Dizygotic recombinant clones
- Transgenic identical clones
- Artificial somatic clones
-
A nursery propagates 6 plants per week from one tray by cuttings. How many weeks are needed to produce 90 plants from one tray?
- 6
- 15
- 90
- 540
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