Quiz on Single-Cell RNA Sequencing

Which of the following is a key advantage of single-cell RNA sequencing (scRNA-seq) compared to bulk RNA sequencing?

• Provides an average gene expression profile across a population of cells

• Identifies gene expression at the resolution of individual cells

• Requires less computational power for data analysis

• More cost-effective for large-scale studies

Which method is commonly used for cell type annotation in scRNA-seq data?

• Gene Set Enrichment Analysis (GSEA)

• Differential Expression Analysis

• Marker Gene Identification

• Sequence Alignment

Which of the following best describes the primary advantage of spatial transcriptomics over traditional RNA sequencing?

• Higher sequencing depth

• Simpler data analysis

• Preservation of spatial context within tissue samples

• Reduced cost for large-scale studies

How many cells in a human body?

• Around 37.2 Millions

• Around 37.2 Billions

• Around 37.2 Trillions

• Around 37.2 Quadrillion

What is single-cell RNA-sequencing?

• A method to understand the gene mutation at the single cell level.

• A method to understand the gene expression at the single cell level.

• A method to understand the gene modification at the single cell level.

• A method to understand the gene perturbation at the single cell level.

Why is the elephant 100 times larger than human?

• Because the elephant’s cell is bigger than the human’s cell.

• Because the elephant’s cell is more complex than the human’s cell.

• Because the elephant has more cells than the human.

• Because an elephant's body requires more energy and resources to function.

Which of the following is NOT a key step in single-cell transcriptomics seq?

• Cell isolation and dissociation

• Reverse transcription of RNA into cDNA

• Sequencing and computational analysis

• Direct measurement of protein expression

Why is a unique molecular identifier (UMI) used in scRNA-seq?

• To amplify gene expression signals.

• To correct for PCR amplification bias and count individual mRNA molecules.

• To increase the number of genes detected in a single cell.

• To separate single cells from each other.

What is a "dropout event" in scRNA-seq?

• A cell that is removed from the analysis due to contamination.

• A sequencing error that removes entire genes from the dataset.

• A gene that is not detected in a cell due to low mRNA capture efficiency. (Dropout events are a common issue in scRNA-seq due to technical limitations.)

• A gene that is only expressed in some cells but not others.

Which technique is often used for single-cell isolation in scRNA-seq?

• Flow cytometry

• Microfluidics (e.g., 10x Genomics) (Microfluidic platforms like 10x Genomics and Drop-seq are widely used for scRNA-seq.)

• Western blot

• SDS-PAGE