
Concept explainers
What are the four nitrogenous bases found in RNA?
a. cytosine, guanine, thymine, uracil (C, G, T, U)
b. adenine, cytosine, guanine, thymine (A, C, G, T)
c. adenine, cytosine, guanine, uracil (A, C, G, U)
d. alanine, cysteine, glycine, threonine (A, C, G, T)

Introduction:
The five nitrogenous bases consist of nitrogen-containing molecule used in the construction of nucleotide, a polymer that is the building block of the nucleic acids like DNA (deoxyribonucleic acid) and RNA (ribonucleic acid).
Answer to Problem 1TYK
Correct answer:
Adenine, cytosine, guanine, and uracil (A, C, G, U)
Explanation of Solution
Explanation/Justification for the correct answer:
Option (c) is given that A, C, G, and U are the nitrogenous bases found in the RNA. A group of five nitrogenous bases is utilized in building the nucleotides. The nitrogenous bases include adenine, guanine, cytosine, thymine, and uracil. The nitrogenous bases can be purines or pyrimidines. The adenine and guanine are six-membered nitrogen-containing rings; and they fall under the purines. While, thymine, uracil, and cytosine are six-membered nitrogen-containing rings; and they fall under pyrimidines. Uracil is found in the RNA and complements adenine instead of thymine. Hence, option (c) is correct.
Explanation for incorrect answers:
Option (a) is given that C, G, T, and U are the nitrogenous bases found in the RNA. In case of DNA, adenine forms double bonds with thymine. Adenine complements either thymine or uracil. There is no strand that consists of both thymine and uracil. So, it is a wrong answer.
Option (b) is given that A, C, G, and T are the nitrogenous bases found in the RNA. A, C, G, and T nitrogenous bases are found in the DNA. In RNA, uracil is present in place of thymine. So, it is a wrong answer.
Option (d) is given that A, C, G, and T are the nitrogenous bases found in the RNA. Alanine, cysteine, glycine, and threonine are not found as nitrogenous bases in DNA or RNA. These are amino acids that form codons and each amino acid has multiple codons. So, it is a wrong answer.
The four nitrogenous bases found in RNA are adenine, cytosine, guanine, and uracil (A, C, G, U).
Want to see more full solutions like this?
Chapter 4 Solutions
Biological Science (6th Edition)
- What kind of organ size regulation is occurring when you graft multiple organs into a mouse and the graft weight stays the same?arrow_forwardWhat is the concept "calories consumed must equal calories burned" in regrads to nutrition?arrow_forwardYou intend to insert patched dominant negative DNA into the left half of the neural tube of a chick. 1) Which side of the neural tube would you put the positive electrode to ensure that the DNA ends up on the left side? 2) What would be the internal (within the embryo) control for this experiment? 3) How can you be sure that the electroporation method itself is not impacting the embryo? 4) What would you do to ensure that the electroporation is working? How can you tell?arrow_forward
- Describe a method to document the diffusion path and gradient of Sonic Hedgehog through the chicken embryo. If modifying the protein, what is one thing you have to consider in regards to maintaining the protein’s function?arrow_forwardThe following table is from Kumar et. al. Highly Selective Dopamine D3 Receptor (DR) Antagonists and Partial Agonists Based on Eticlopride and the D3R Crystal Structure: New Leads for Opioid Dependence Treatment. J. Med Chem 2016.arrow_forwardThe following figure is from Caterina et al. The capsaicin receptor: a heat activated ion channel in the pain pathway. Nature, 1997. Black boxes indicate capsaicin, white circles indicate resinferatoxin. You are a chef in a fancy new science-themed restaurant. You have a recipe that calls for 1 teaspoon of resinferatoxin, but you feel uncomfortable serving foods with "toxins" in them. How much capsaicin could you substitute instead?arrow_forward
- What protein is necessary for packaging acetylcholine into synaptic vesicles?arrow_forward1. Match each vocabulary term to its best descriptor A. affinity B. efficacy C. inert D. mimic E. how drugs move through body F. how drugs bind Kd Bmax Agonist Antagonist Pharmacokinetics Pharmacodynamicsarrow_forward50 mg dose of a drug is given orally to a patient. The bioavailability of the drug is 0.2. What is the volume of distribution of the drug if the plasma concentration is 1 mg/L? Be sure to provide units.arrow_forward
- Determine Kd and Bmax from the following Scatchard plot. Make sure to include units.arrow_forwardChoose a catecholamine neurotransmitter and describe/draw the components of the synapse important for its signaling including synthesis, packaging into vesicles, receptors, transporters/degradative enzymes. Describe 2 drugs that can act on this system.arrow_forwardThe following figure is from Caterina et al. The capsaicin receptor: a heat activated ion channel in the pain pathway. Nature, 1997. Black boxes indicate capsaicin, white circles indicate resinferatoxin. a) Which has a higher potency? b) Which is has a higher efficacy? c) What is the approximate Kd of capsaicin in uM? (you can round to the nearest power of 10)arrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax CollegeHuman Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning
- Biology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage LearningHuman Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage LearningBiology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning





