Indicate whether the following statements are true (T) or false (F) by drawing a circle around T or F in each case - Leaving Cert Biology - Question 2 - 2014
Question 2
Indicate whether the following statements are true (T) or false (F) by drawing a circle around T or F in each case.
Example: Alleles are different forms of the same... show full transcript
Worked Solution & Example Answer:Indicate whether the following statements are true (T) or false (F) by drawing a circle around T or F in each case - Leaving Cert Biology - Question 2 - 2014
Step 1
(a) Chromosomes are made up of DNA and protein.
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Answer
True. Chromosomes are indeed composed of DNA and protein, which together form the chromatin structure.
Step 2
(b) A human sperm cell contains 23 chromosomes.
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Answer
True. Human sperm cells are haploid and contain 23 chromosomes, which is half the number present in somatic cells.
Step 3
(c) Phenotype is the genetic make-up of an organism.
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False. Phenotype refers to the observable characteristics of an organism, while genotype refers to its genetic makeup.
Step 4
(d) Replication is the copying of DNA.
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True. DNA replication is the biological process of producing two identical replicas from one original DNA molecule.
Step 5
(e) RNA contains the base thymine.
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Answer
False. RNA contains uracil instead of thymine, which is found in DNA.
Step 6
(f) Genetic engineering is the manipulation and alteration of genes.
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True. Genetic engineering involves modifying the genetic material of organisms to achieve desired traits.
Step 7
(g) The copying of the DNA code into mRNA is called transcription.
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Answer
True. Transcription is the process by which the genetic information in DNA is transferred to messenger RNA (mRNA).
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