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
- You have identified a new species of a Gram-positive bacteria. You would like to screen their genome for all proteins that are covalently linked to the cell wall. You have annotated the genome, so that you identified all the promoters, operons, and genes sequences within the operons. Using these features, what would you screen for to identify a set of candidates for proteins covalently linked to the bacterial cell wall.arrow_forwardBelow is a diagram from a genomic locus of a bacterial genome. Each arrow represents a coding region, and the arrowheads indicate its orientation in the genome. The numbers are randomly assigned. Draw the following features on the diagram, and explain your rationale for each feature: 10 12 合會會會會長 6 a) Expected transcriptions, based on known properties of bacterial genes and operons. How many proteins are encoded in each of the transcripts? b) Location of promoters (include rationale) c) Location of transcriptional terminators (include rationale) d) Locations of Shine-Dalgarno sequences (include rationale)arrow_forwardSample excuse letter in school class for the reasons of headaches and dysmenorrhea caused by menstrual cyclearrow_forward
- How do the muscles on the foot work to balance on an ice skate, specifically the triangle of balance and how does it change when balancing on an ice skate? (Refer to anatomy, be specific)arrow_forwardWhich of the following is NOT an example of passive immunization? A. Administration of tetanus toxoid B. Administration of hepatitis B immunoglobulin C. Administration of rabies immunoglobulin D. Transfer of antibodies via plasma therapyarrow_forwardTranscription and Translation 1. What is the main function of transcription and translation? (2 marks) 2. How is transcription different in eukaryotic and prokaryotic cells? (2 marks) 3. Explain the difference between pre-mRNA and post-transcript mRNA. (2 marks) 4. What is the function of the following: (4 marks) i. the cap ii. spliceosome iii. Poly A tail iv. termination sequence 5. What are advantages to the wobble feature of the genetic code? (2 marks) 6. Explain the difference between the: (3 marks) i. A site & P site ii. codon & anticodon iii. gene expression and gene regulation 7. Explain how the stop codon allows for termination. (1 mark) 8. In your own words, summarize the process of translation. (2 marks)arrow_forward
- In this activity you will research performance enhancers that affect the endocrine system or nervous system. You will submit a 1 page paper on one performance enhancer of your choice. Be sure to include: the specific reason for use the alleged results on improving performance how it works how it affect homeostasis and improves performance any side-effects of this substancearrow_forwardNeurons and Reflexes 1. Describe the function of the: a) dendrite b) axon c) cell body d) myelin sheath e) nodes of Ranvier f) Schwann cells g) motor neuron, interneuron and sensory neuron 2. List some simple reflexes. Explain why babies are born with simple reflexes. What are they and why are they necessary. 3. Explain why you only feel pain after a few seconds when you touch something very hot but you have already pulled your hand away. 4. What part of the brain receives sensory information? What part of the brain directs you to move your hand away? 5. In your own words describe how the axon fires.arrow_forwardMutations Here is your template DNA strand: CTT TTA TAG TAG ATA CCA CAA AGG 1. Write out the complementary mRNA that matches the DNA above. 2. Write the anticodons and the amino acid sequence. 3. Change the nucleotide in position #15 to C. 4. What type of mutation is this? 5. Repeat steps 1 & 2. 6. How has this change affected the amino acid sequence? 7. Now remove nucleotides 13 through 15. 8. Repeat steps 1 & 2. 9. What type of mutation is this? 0. Do all mutations result in a change in the amino acid sequence? 1. Are all mutations considered bad? 2. The above sequence codes for a genetic disorder called cystic fibrosis (CF). 3. When A is changed to G in position #15, the person does not have CF. When T is changed to C in position #14, the person has the disorder. How could this have originated?arrow_forward
- hoose a scientist(s) and research their contribution to our derstanding of DNA structure or replication. Write a one page port and include: their research where they studied and the time period in which they worked their experiments and results the contribution to our understanding of DNA cientists Watson & Crickarrow_forwardhoose a scientist(s) and research their contribution to our derstanding of DNA structure or replication. Write a one page port and include: their research where they studied and the time period in which they worked their experiments and results the contribution to our understanding of DNA cientists Watson & Crickarrow_forward7. Aerobic respiration of a protein that breaks down into 12 molecules of malic acid. Assume there is no other carbon source and no acetyl-CoA. NADH FADH2 OP ATP SLP ATP Total ATP Show your work using dimensional analysis here: 3arrow_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



