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DNA and RNA

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Questions and Answers

Which term refers to the passing on of characteristics from one generation to the next by genes?

Gene expression
Chromosome structure
Heredity (correct)
Alleles

What is a gene?

A structure that holds chromatids together
A feature or a protein produced from a gene
A specific position on a chromosome
A length of DNA on a chromosome that codes for a protein (correct)

What is gene expression?

The specific position of a gene on a chromosome
The structure of a chromosome
The passing on of characteristics from one generation to the next by genes
The process by which the information from a gene is used to produce a feature or a protein (correct)

What is the locus of a gene?

The specific position on a chromosome where a gene is located (B) Signup and view all the answers

What are alleles?

Different options of a gene, either dominant or recessive (D) Signup and view all the answers

What is the structure of a chromosome?

An organized length of DNA and proteins called histones (B) Signup and view all the answers

Who discovered the molecular structure of DNA?

James Watson and Francis Crick (D) Signup and view all the answers

Which of the following is true about DNA replication?

DNA replication requires ATP and DNA polymerase (B) Signup and view all the answers

Which of the following is a difference between RNA and DNA?

RNA has the base thymine while DNA has uracil (C) Signup and view all the answers

What is the function of messenger RNA (mRNA)?

Carries information from the DNA to the ribosomes (B) Signup and view all the answers

What is the purpose of DNA profiling?

To produce a unique pattern of bands from DNA (B) Signup and view all the answers

What is the role of gel electrophoresis in DNA profiling?

To separate DNA fragments based on their size (D) Signup and view all the answers

What is genetic screening used for?

To check for the presence or absence of a particular allele or gene (D) Signup and view all the answers

What is the purpose of adding a radioactive or fluorescent marker to a DNA sample in genetic screening?

To label a particular allele or gene (C) Signup and view all the answers

What are the four bases found in DNA?

Adenine, Thymine, Guanine, Cytosine (B) Signup and view all the answers

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