Exons - Study guides, Revision notes & Summaries

What modification neutralizes the charges on histones and looses up the interactions between histones and DNA? - Answer- ACETYLATION Two types of post-transcriptional modifications that take place in the mRNA of eukaryotes - Answer- the addition of a CAP at the 5' end of the transcript and the addition of a POLY A sequence at the 3' end of the message Nucleic acid blotting is widely used in recombinant DNA technology. In a Southern blot one generally - Answer- Hybridizes filter-bound DNA...

Science Bowl Biology Questions and Answers 100% Pass The purine bases are: A. adenine and guanine B. adenine and cytosine C. thymine and cytosine D. uracil, thymine, and cytosine A 2. Four chromatids would be considered a: A. mutation B. non-disjunction C. tetrad D. synapses C 3. Which of the following is NOT in the class insecta: A. bees B. moths C. fireflies D. spiders D 4. Plant cells differ from animal cells in that only plant cells possess: A. a nucleu...

WGU C785 Preparedness baseline Exam knowledge Test Questions with A+ rated Marking scheme Latest 2024 How does the activation energy of enzyme-catalyzed reactions compare to those of corresponding uncatalyzed reactions? - correct answer The activation energy of enzyme-catalyzed reactions is lower than the uncatalyzed reaction The activation energy is the amount of energy needed to get the reaction started and over the energy hill to form products. Enzymes reduce the amount of energy needed...

Are mutations in exons or introns more likely to result in an altered protein? - Exons Are mutations permanent or temporary changes in the DNA sequence? - Permanent changes in the DNA Avery - genes are composed of DNA , DNA (not proteins) can transform the properties of cells deletion mutation - a mutation in which one or more pairs of nucleotides are removed from a gene Does crossing over occur in mitosis? - No, only in meiosis Does meiosis result in diploid or haploid cells? - haploid ...

IB Biology HL Topic 7 Latest 2024 Graded A DNA structure antiparallel strands, 3'-5' linkages, and H bonding between purines and pyrimidines Nucleosomes consist of DNA wrapped around 3 histone proteins and are held together by another histone protein Nucleosomes help to supercoil chromosomes and help to regulate transcription Unique (single-copy) genes are translated and constitute a surprisingly small proportion of eukaryotic DNA Highly repetitive sequences constitute 5-4...

BIOCHEMISTRY USMLE STEP 1 EXAM QUESTIONS WITH CORRECT ANSWERS Achondroplasia involves what defect? -ANS_ Cell-signlaling defect of fibroblast growth factor (FGF) receptor 3 The splicesome exsises introns or exons? -ANS_ Introns What chemotherap agent inhibits thymidylate synthase (therefore decreasing pyrmidine synthesis for DNA)? -ANS_ 5-fluorouracil

Campbell Biology Chapter 17 Test Questions with Answers alternative RNA splicing - Answer-A type of eukaryotic gene regulation at the RNA-processing level in which different mRNA molecules are produced from the same primary transcript, depending on which RNA segments are treated as exons and which as introns Beadle and Tatum - Answer-Exposed bread mold to X-rays, creating mutants. Showed that each gene encodes a particular substance ("one gene, one enzyme" concept, later restated "one gen...

Exam 3: BIO1201/ BIO 1201 (Latest 2024/ 2025 Update) | Questions and Verified Answers| 100% Correct| Grade A – LSU Q: How are genes coordinately controlled in eukaryotic cells? Coordinately controlled genes in eukaryotic cells share a set of control elements. Coordinately controlled genes in eukaryotic cells are activated by the same chemical signals. Coordinately controlled genes in eukaryotic cells are located together on the same chromosome. Answer: Coordinately controlled...

ADVANCED PLACEMENT (AP) BIOLOGY: Transcription 32 Questions Correctly Answered | 100% Rated Question 1 Which of the following statements about post-transcriptional processing is true? Possible Answers: A methylguanine cap is added to the 3' end of the mature mRNA Exons are spliced out of hnRNA and are not part of the mature mRNA Post-transcriptional hnRNA processing prevents RNA from degrading as it leaves the nucleus A poly-A tail is added to the 5' end of the mature mRNA Cor...

ASCP Molecular Biology Certification Exam Questions and Answers 100% Pass Pyrimidine One carbon ring Cytosine, Thymine, Uracil What is the function of mRNA? Carries genetic info out of nucleus Transcript translated to protein What is the function of tRNA? Carries aa to ribosome Anticodon pairs with codon on mRNA strand What is the function of rRNA? part of ribosome structure most abundant RNA coordinated coupling of tRNA to mRNA codons Feedback inhibition Product of pathway is noncompetiti...