In eukaryotic organisms genes are
A - VCE - SSCE Biology - Question 1 - 2006 - Paper 1
Question 1
In eukaryotic organisms genes are
A. composed of DNA.
B. alternative forms of an allele.
C. composed of DNA and protein.
D. the same length as a chromosome.
Worked Solution & Example Answer:In eukaryotic organisms genes are
A - VCE - SSCE Biology - Question 1 - 2006 - Paper 1
Step 1
A. composed of DNA.
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Answer
Genes are fundamental units of heredity in eukaryotic organisms and are primarily composed of DNA. This DNA contains the instructions for building and maintaining the organism, coding for proteins that are essential for various biological functions.
Step 2
B. alternative forms of an allele.
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Answer
This statement refers to alleles, which are different versions of a gene found at the same locus on homologous chromosomes. While genes consist of DNA, the statement is not accurate for the broader definition of genes themselves.
Step 3
C. composed of DNA and protein.
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Answer
While genes are made of DNA, they can also interact with proteins for processes such as transcription and regulation. However, the primary structure of a gene is indeed DNA, making this option partially correct but less precise.
Step 4
D. the same length as a chromosome.
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Answer
This statement is incorrect. A chromosome is composed of many genes along with the associated regulatory elements. Thus, genes do not have a uniform length relative to chromosomes.
