Question 1

Which of the following best describes a gene according to the working definition used in clinical genomics?

Accepted Answer

A sequence of DNA nucleotides that codes for either a protein or a type of RNA, including its proximal upstream regulatory elements.

Question 2

What is the primary function of the promoter region in a gene?

Accepted Answer

It serves as the binding site for transcription factors and RNA polymerase II to initiate transcription.

Question 3

Which of the following statements about exons and introns is correct?

Accepted Answer

Exons are spliced together to form the mature mRNA.

Question 4

Alternative splicing allows a single gene to:

Accepted Answer

Produce multiple different mRNA transcripts and protein products.

Question 5

Which of the following is true regarding gene nomenclature?

Accepted Answer

Gene symbols are italicized, while protein symbols are written in regular text.

Question 6

What is an Open Reading Frame (ORF)?

Accepted Answer

A continuous stretch of codons that begins with a start codon and ends at a stop codon.

Question 7

If a gene is located at 7p11.2, what does this notation indicate?

Accepted Answer

The gene is on chromosome 7, p arm, band 11.2.

Question 8

Which of the following best describes a gene desert?

Accepted Answer

A region of the genome with no genes present over megabase distances.

Question 9

In the context of overlapping genes, what does a 'convergent' partial overlap mean?

Accepted Answer

Two genes are transcribed towards each other and overlap partially.

Question 10

Which of the following is a plausible reason why the number of protein products in humans greatly exceeds the number of protein-coding genes?

Accepted Answer

Alternative splicing allows a single gene to produce multiple protein variants.

Question 11

Which of the following best describes the 5' untranslated region (5' UTR) of a gene?

Accepted Answer

A region upstream of the coding sequence that is transcribed but not translated.

Question 12

A researcher finds two genes on opposite strands of DNA, with one gene's start codon overlapping the other gene's stop codon. What is this an example of?

Accepted Answer

A convergent partial overlap.

Question 13

Which of the following statements about enhancers is correct?

Accepted Answer

Enhancers can be located far from the gene they regulate, even on different chromosomes.

Question 14

Given a DNA sequence, how would you determine the sequence of the complementary strand?

Accepted Answer

By replacing every A with T, T with A, C with G, and G with C.

Question 15

Which of the following is a function of the Human Genome Organization (HUGO) Gene Nomenclature Committee?

Accepted Answer

Establishing standardized gene symbols and names.

Question 16

A gene is described as 'nested antiparallel' in a genome map. What does this mean?

Accepted Answer

The gene is completely contained within another gene and transcribed in the opposite direction.

Question 17

Which of the following best explains why gene symbols and protein symbols are formatted differently in scientific literature?

Accepted Answer

To distinguish between the DNA sequence (gene) and its product (protein).

Question 18

If you are using a genome browser to view the EGFR gene, which of the following would you expect to see?

Accepted Answer

The gene's location on a chromosome ideogram, its length in base pairs, and its exon-intron structure.

Question 19

Which of the following is a plausible explanation for why some genes have multiple names in the scientific literature?

Accepted Answer

Different researchers may discover the same gene independently and assign different names.

Question 20

Which of the following best describes the function of insulators in gene regulation?

Accepted Answer

They block or suppress transcription, sometimes from a distance.

Human Gene Structure, Nomenclature, and Genomic Organization

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