
Molecules that are found in living cells and contain the element ___________ are considered organic molecules.
- a. hydrogen
- b. carbon
- c. oxygen
- d. nitrogen
- e. calcium

Introduction: After a lot of research, it has been found that all living organisms have organic molecules and macromolecules. Organic molecules and macromolecules may be carbohydrates, lipids, proteins, or nucleic acids. Organic molecules are named so because these molecules were seen first in living organisms.
Answer to Problem 1TY
Correct answer: Molecules that are found in living cells and contain the element carbon are considered as organic molecules. Hence, the correct answer is option b.
Explanation of Solution
Reason for correct answer:
Certain types of molecules were identified in all forms of life on Earth. All of these molecules contain carbon, therefore they are called as organic molecules. Organic molecules are studied under organic chemistry. Results of studies conducted by Wöhler and Kolbe showed that carbon is central to all organic molecules. Carbon is important because it has properties that make it suitable. Carbon can form four covalent bonds. It can exist as isomers and can bind to many different types of functional groups. Thus, carbon forms the backbone of all organic molecules.
Option b. is given as “carbon”.
Organic molecules are found in living cells and contain carbon. Hence, the correct answer is option b.
Reasons for incorrect answer:
Option a. is given as, “hydrogen”.
Organic molecules are based on the covalent interactions of hydrogens and carbons. Hydrogen provides organic molecules with the ability to form hydrogen bonds. However, the presence of hydrogen in organic molecules is not a necessity as there are certain organic molecules that do not contain hydrogen. Hence, option a. is incorrect.
Option c. is given as, “oxygen”.
Oxygen provides organic molecules with the ability to form hydrogen bonds and oxidative potential. However, the presence of oxygen in organic molecules is not a necessity as many organic molecules do not contain oxygen. Hence, option c. is incorrect.
Option d. is given as, “nitrogen”.
Nitrogen provides organic molecules with the ability to form hydrogen bonds. Nitrogen is important for the formation of amino acids and the genetic content of organisms. However, the presence of nitrogen in organic molecules is not a necessity as many organic molecules do not contain nitrogen. Hence, option d. is incorrect.
Option e. is given as, “calcium”.
Calcium is required in the skeletal system, muscular and nervous systems of the body. The presence of calcium in organic molecules is not a necessity as many organic molecules do not contain calcium. Hence, option e. is incorrect.
Hence, the options a., c., d. and e. are incorrect.
Thus, carbon is found in all living organisms and form an essential part of all organic molecules.
Want to see more full solutions like this?
Chapter 3 Solutions
Biology
Additional Science Textbook Solutions
Microbiology Fundamentals: A Clinical Approach
Biological Science (6th Edition)
The Cosmic Perspective (8th Edition)
Campbell Biology in Focus (2nd Edition)
Laboratory Manual For Human Anatomy & Physiology
- What did the Cre-lox system used in the Kikuchi et al. 2010 heart regeneration experiment allow researchers to investigate? What was the purpose of the cmlc2 promoter? What is CreER and why was it used in this experiment? If constitutively active Cre was driven by the cmlc2 promoter, rather than an inducible CreER system, what color would you expect new cardiomyocytes in the regenerated area to be no matter what? Why?arrow_forwardWhat 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_forward
- You 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_forwardDescribe 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_forward
- The 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_forwardWhat 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_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax CollegeHuman Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage LearningBiology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning



