Question 1

Which of the following best describes the main function of the BLAST tool in genomics research?

Accepted Answer

It compares nucleotide or protein sequences to database sequences to identify similarities.

Question 2

A researcher finds a DNA sequence with an E-value of $$2 	imes 10$$^{-14}$$ in a BLAST search. What does this indicate about the match?

Accepted Answer

The match is highly significant and unlikely to be due to chance.

Question 3

Which of the following is a key difference between totipotent and pluripotent stem cells?

Accepted Answer

Totipotent cells can form both embryonic and extraembryonic tissues, while pluripotent cells can only form embryonic tissues.

Question 4

Which database is the largest publicly available repository for nucleotide sequences and is managed by the NCBI?

Accepted Answer

GenBank

Question 5

In a GWAS (Genome-Wide Association Study), what does a high negative log p-value for a locus indicate?

Accepted Answer

The locus is significantly associated with the trait.

Question 6

Which of the following best describes the role of homeotic (Hox) genes in animal development?

Accepted Answer

They determine the identity and arrangement of body segments along the anterior-posterior axis.

Question 7

A mutation in the Ultrabithorax (Ubx) gene in Drosophila results in a four-winged fly. What type of mutation is this an example of?

Accepted Answer

Loss-of-function mutation

Question 8

Which of the following is a real-world application of synthetic biology?

Accepted Answer

Using engineered microbes to break down toxic environmental pollutants.

Question 9

During early mammalian embryogenesis, what is the main source of mRNA and proteins before the maternal-to-zygotic transition (MZT)?

Accepted Answer

Maternal mRNA and proteins stored in the egg

Question 10

Which of the following best describes the process of DNA methylation reprogramming in early embryogenesis?

Accepted Answer

Global demethylation occurs in both paternal and maternal genomes, followed by de novo methylation after implantation.

Question 11

Which of the following is a key feature of the colinearity rule in Hox gene expression?

Accepted Answer

Genes at the 3’ end of the cluster are expressed earlier and more anteriorly.

Question 12

A patient’s genome is analyzed using a SNP microarray containing 500,000 probes. What type of study is this most likely part of?

Accepted Answer

Genome-wide association study (GWAS)

Question 13

Which of the following statements about induced pluripotent stem cells (iPSCs) is correct?

Accepted Answer

iPSCs are generated by reprogramming differentiated cells using transcription factors.

Question 14

Which of the following is an example of extrinsic information guiding cell differentiation during development?

Accepted Answer

A cell receiving chemical signals from neighboring cells to become a photoreceptor.

Question 15

Which of the following best describes the function of pair-rule genes in Drosophila embryogenesis?

Accepted Answer

They subdivide the embryo into regions about two segments wide.

Question 16

A researcher wants to identify the protein-coding regions in a newly sequenced genome. Which feature should they look for?

Accepted Answer

Open reading frames (ORFs) beginning with ATG and ending with TAA, TAG, or TGA.

Question 17

Which of the following is a direct application of multi-omics technology in biomedical research?

Accepted Answer

Integrating genomics, transcriptomics, and proteomics data to understand disease mechanisms.

Question 18

Which of the following statements about genomic imprinting is correct?

Accepted Answer

Imprints are erased in primordial germ cells and re-established in gametes.

Question 19

Which of the following best explains why functional redundancy among paralogous Hox genes can result in mild phenotypes when individual genes are knocked out?

Accepted Answer

Other paralogs can compensate for the loss of function.

Question 20

Which of the following is a real-world example of how genetic testing is transforming medical diagnosis?

Accepted Answer

Noninvasive prenatal testing (NIPT) using cell-free fetal DNA in maternal blood to detect chromosomal abnormalities.

Genomic Analysis, Bioinformatics, and Applications in Genetics

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