Biology Definitions Advanced Quiz 1
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Advanced Quiz 1
1. What is the primary function of helicase during DNA replication?
Unwinds the DNA double helix by breaking hydrogen bonds
Synthesizes new DNA strands
Joins DNA fragments
2. Which enzyme catalyzes the formation of peptide bonds during translation?
Peptidyl transferase
Aminoacyl-tRNA synthetase
RNA polymerase
3. What is the main role of ubiquitination in eukaryotic cells?
DNA repair
Targets proteins for proteasomal degradation
Activates transcription factors
4. Which structure houses the electron transport chain in mitochondria?
Inner mitochondrial membrane
Mitochondrial matrix
Intermembrane space
5. What is the function of topoisomerase II during chromosome segregation?
Synthesizes histones
Removes RNA primers
Decatenates intertwined sister chromatids
6. Which protein complex forms the kinetochore during mitosis?
Centromere-associated proteins
Telomerase subunits
Origin recognition complex
7. What initiates the anaphase promoting complex (APC/C) activation?
Cyclin D accumulation
Proper chromosome-microtubule attachment
DNA damage detection
8. Which process describes RNA interference (RNAi)?
Post-transcriptional gene silencing by small RNAs
Chromatin remodeling
Alternative splicing
9. What is the primary site of the Calvin cycle in photosynthesis?
Thylakoid lumen
Stroma lamellae
Chloroplast stroma
10. Which hormone activates the cAMP signaling pathway in liver cells?
Glucagon
Insulin
Cortisol
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