1. Proteins are composed of _______

 Simple sugars

 Amino acids

 Fatty acids

 Nucleotides

2. A mutation that disrupts spliceosome function would most directly interfere with which process?

 DNA replication by DNA polymerase

 Transcription initiation by RNA polymerase

 Chromatin remodeling by histone acetyltransferases

 Removal of introns from pre-mRNA

3.

Which macromolecules are the primary components of the central dogma of gene expression?

 DNA, RNA, and lipids

 DNA, RNA, and vitamins

 DNA, RNA, and proteins

 DNA, RNA, and carbohydrates

4. In eukaryotic cells, where does pre-mRNA processing (5′ capping, splicing, and polyadenylation) occur?

 Cytoplasm

 Ribosome

 Nucleus

 Cell membrane

5. _______ directly determines the three-dimensional structure of a protein

 Amino acid sequence

 Lipids

 RNA

 DNA

6. Which type of RNA is a structural and catalytic component of ribosomes?

 siRNA

 rRNA

 mRNA

 tRNA

7. In most cases, the functional outcome of gene expression in eukaryotes is the production of _______

 Proteins that determine cellular structure and function

 Signals that trigger apoptosis

 New chromosomes during mitosis

 Duplicated DNA for cell division

8. In eukaryotic cells, the nucleus is the primary site of _______

 Translation

 Lipid synthesis

 Transcription

 Protein folding

9. A eukaryotic enhancer is relocated downstream of a gene but remains functional. This demonstrates _______

 RNA instability

 Transcription termination

 Position-independent regulatory activity

 Promoter dependency

10. After proteins are synthesized in the rough endoplasmic reticulum (RER), which organelle is primarily responsible for their modification, sorting, and packaging for transport?

 Golgi apparatus

 Nucleus

 Mitochondria

 Peroxisome

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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.