Biology Concepts Quiz

Which two core biological concepts are highlighted as foundational for understanding single-cell and spatial gene expression?

• Transcriptional regulation and cellular heterogeneity

• Chromatin remodeling and epigenetic inheritance

• Cellular architecture and the Central Dogma

• Signal transduction pathways and metabolic regulation

What is the definition of a cell ?

• A membrane-bound organelle responsible for coordinating cellular activities

• A self-assembling nucleoprotein complex capable of autonomous replication

• The smallest structural and functional unit of an organism

• A multicellular structure with specialized functions

The "Nucleus" of a cell is analogous to what in a factory?

• The factory wall

• "soup" inside

• The main office/control center

• The shipping department

Why is it stated that "diseases are often diseases of cells"?

• Because only single-celled organisms get sick.

• Because all diseases are contagious.

• Because all living things are made of cells, and their malfunction leads to disease

• Because pathogenesis is driven solely by anomalies in cell–cell adhesion, with all other cellular functions intact

What can single-cell RNA-seq determine in a heterogeneous tissue?

• The proportional composition of different cell types within the tissue

• The average total RNA concentration of the entire tissue

• The thickness of the tissue section

• The gene sequence content in each cell

What is the main characteristic that makes RNA (specifically mRNA) "dynamic" and valuable for single-cell analysis?

• It is permanently stored in the nucleus, providing a historical record of transcription

• It undergoes rapid synthesis and degradation, so its abundance mirrors real-time cellular activity

• It carries covalent epigenetic marks that determine different gene expression patterns

• It forms single-stranded helices that enhance transcript dynamic in the cytoplasm

Which molecule is described as "The Molecular Worker" and performs most of the work in cells, essential for structure, function, and regulation?

• DNA

• RNA

• Protein

• Glucose

What is the correct sequence of the Central Dogma of Molecular Biology?

• Protein → RNA → DNA

• RNA → Protein → DNA

• DNA → RNA → Protein

• DNA → Protein → RNA

What defines a cell's identity, function, and state, even though all cells in an individual generally have the same DNA?

• The size of the nucleus

• The number of chromosomes

• The sets of gene expression

• The cell's physical location

In Single-Cell Transcriptomics, what is the typical output data structure called?

• A cell interaction matrix.

• A max-like protein matrix

• A cell-by-gene matrix.

• A distance matrix