BIOL 250 Final Exam Questions and 100% Correct Answers
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Course
BIO 250
Institution
BIO 250
What types of biological molecules replicate DNA? proteins
What processes occur during interphase? DNA replication Organelle replication RNA synthesis Protein synthesis
Is DNA, RNA, or both produced by DNA polymerase? DNA
You observe that Gene X is highly expressed in neurons but is not expresse...
BIOL 250 Final Exam Questions and
100% Correct Answers
What types of biological molecules replicate DNA? ✅proteins
What processes occur during interphase? ✅DNA replication
Organelle replication
RNA synthesis
Protein synthesis
Is DNA, RNA, or both produced by DNA polymerase? ✅DNA
You observe that Gene X is highly expressed in neurons but is not expressed in
intestinal cells. If you could assess the chromatin surrounding Gene X in both cell types,
what would expect to observe? ✅high levels of DNA methylation in intestinal cells
Which of the following mutations would most likely disrupt the nuclear localization of a
protein?
Normal: Pro - Pro - Lys - Lys - Lys - Arg - Lys - Val ✅pro-pro-asp-lys-lys-arg-lys-val
Only _____ contains ribose ✅RNA
Molecules are made of ________ that are attached by chemical bonds formed by
sharing, gaining, or losing _________. ✅isotopes / electrons
How is M-phase rapidly triggered by M-Cdks? ✅M-cyclin/cdk complex is held inactive
by phosphorylation and is rapidly activated by Cdc25
Protein domains are sequences of amino acids that are similar in many different
proteins and lead to different proteins that are made of similar 'parts'. What is the most
likely explanation for the evolution of protein domains? ✅exons are shuffled to new
genes
Rna in cells differs from DNA in that _____________ ✅it is single-stranded and can
fold into a variety of structures
Where would you predict a protein to be localized if it has a chain of hydrophobic amino
acids at the N-terminus? ✅ER
Which of the following amino acids would you expect to find on the surface of a protein?
✅serine
, What are the steps of protein transport across the ER? ✅1 - begins in cytosol
2 - ER signal binds to SRP (stalls)
3 - ribosome anchored to membrane by SRP
4 - ER signal transferred to the protein translator
5 - protein is transferred across membrane
6 - signal peptidase cleaves the ER signal and protein is released in ER lumen
What is related to transcription? ✅RNA polymerase
General transcription factors
Terminator
Sigma factor
Splicing
What is related to DNA replication? ✅origin of replication
Primase
DNA polymerase
Helicase
What is related to translation? ✅ribosome
Trna synthetase
Trna
Start codon
Amino acids
What are haploid cells? ✅sperm / egg
What are diploid cells? ✅germ line cell
Skin cell
Blood cell
What happens to the function of a protein if it is not folded correctly? ✅the shape of the
protein determines the function
The ______ is a large protein complex that degrades proteins by recognizing _______
on the proteins that have been marked for degradation. ✅proteasome / ubiquitin
Enhancer ✅distal DNA sequence that regulates transcription of a gene thousands of
bases away
Operator ✅DNA sequence that regulars transcription in prokaryotes
Histone acetyltransferase ✅enzyme that assists transcriptional activators
Target gene ✅a gene that is expresses in response to transcriptional activator
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