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
- _________________ are the building blocks of proteins. a. Nucleic Acids b. Amino Acids c. Hydrochloric Acids d. Ribonucleic Acidsarrow_forwardThe smallest unit of any substance is the . a. atom b. molecule c. cellarrow_forwardWhich of the following is a class of molecules that encompasses all of the other molecules listed? a. triglycerides c. waxes e. lipids b. fatty acids d. steroids f. phospholipidsarrow_forward
- When hydrogen is a part of a ________, it has a slight positive charge. a. Ionic bond b. polar covalent bond c. nonpolar covalent bondarrow_forwardA (n)_______ reaction occurs when two molecules of glucose combine to form a disaccharide molecule A. dehydration B. Ionic Bond C. Hydrolysis D. Hydrogen bondarrow_forwardHydrogen bonds are a type of _____________ bond or interaction. a. ionic b. dipole–dipole c. dipole-induced dipole d. London dispersionarrow_forward
- α-linolenic acid has a lower melting point than ___________ because, although they have the same number of carbons, the former is an unsaturated fatty acid whereas the the latter is a saturated fatty acid. A. palmitic acid B. stearic acid C. oleic acid D. linoleic acid E. arachidonic acidarrow_forwardThis occurs when the cations and anions are attracted to the positive and negative ends of water molecules: A. ionic bonding B. dissociation C. covalent bonding D. hydrogen bondingarrow_forwardBonds in which atoms share electrons are defined as _____________ bonds.a. hydrogenb. ionicc. doubled. covalentarrow_forward
- Peptide bond cleavage is a _____________ reaction. a. hydration b. hydrolysis c. addition d. eliminationarrow_forwardWhich of the following molecules would you expect to have a lot of nitrogen (N) in it? Group of answer choices A. carbohydrate B. protein C. polysccharide D. steroid E. fatty acidarrow_forwardWhich of the following describes an organic molecule that consists of one or more chains of amino acids folded up in a specific shape? A. Nucleic acid B. Protein C. Carbohydrate D. Lipidarrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education