1. RNA polymerase synthesizes _______ during transcription

 Ribosomal RNA (rRNA)

 Transfer RNA (tRNA)

 Messenger RNA (mRNA)

 Deoxyribonucleic acid (DNA)

2. Ribosomes are primarily composed of _______

 DNA and proteins

 Lipids and proteins

 RNA and proteins

 Carbohydrates and RNA

3. Post-transcriptional modification in eukaryotes does NOT include _______

 DNA replication

 RNA splicing

 5′ capping

 Polyadenylation

4. Genes are best defined as _______

 RNA molecules involved in translation

 Enzymes regulating metabolism

 Segments of DNA encoding functional products

 Proteins stored in the nucleus

5. The template strand in transcription is _______

 The non-coding DNA strand

 The RNA strand

 The protein strand

 The coding DNA strand

6. Gene expression primarily involves _______

 Protein degradation

 Transcription and translation

 Cell division

 DNA replication and repair

7. Which statement best defines a gene in the context of gene expression?

 Only the parts of DNA that code directly for amino acids

 A molecule that catalyzes biochemical reactions in the cell

 Any random stretch of DNA, regardless of whether it is expressed

 A segment of DNA that codes for a functional product, such as a protein or RNA

8. Transcription in eukaryotes occurs in the _______

 Ribosome

 Cytoplasm

 Nucleus

 Golgi apparatus

9. According to the central dogma of molecular biology, what is the usual flow of genetic information in a cell?

 Protein → RNA → DNA

 RNA → DNA → Protein

 DNA → Protein → RNA

 DNA → RNA → Protein

10. Translation in eukaryotic cells primarily occurs in the _______

 Mitochondria only

 Cytoplasm (on ribosomes)

 Chloroplast only

 Nucleus

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Question 1 of 10

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Gene Expression MCQs

Gene Expression is the process by which information encoded in DNA is converted into functional products—primarily proteins or functional RNAs.

It occurs in two main stages:

• Transcription: DNA is copied into messenger RNA (mRNA).
• Translation: mRNA is decoded by ribosomes to synthesize proteins.

Gene expression is tightly regulated at multiple levels (epigenetic, transcriptional, post-transcriptional, and translational), allowing cells to control when, where, and how much of a gene product is produced, which underlies cell differentiation, development, and environmental responses.