Concept explainers
_______________ make(s) up the nucleus of an atom.
- a. Protons and electrons
- b. Protons and neutrons
- c. DNA and RNA
- d. Neutrons and electrons
- e. DNA only
Introduction: Atom is the smallest structural unit of any matter. The nucleus is the centermost part of the atom. The atom consists of proton, electron, and neutron. Multiple numbers of atoms combine together and form the molecules.
Answer to Problem 1TY
Correct answer: The “protons and neutrons” forms the nucleus of an atom. Hence, the correct answer is option b.
Explanation of Solution
Reason for correct answer:
The nucleus of the atom is formed by the “neutrons and protons”. These two particles provide the mass to the atom and both the particles are heavier than the electron. The charge possessed by the proton is positive in nature. However, in the case of neutrons, the charge is not present. Both the particles are present in the nucleus of an atom and the electrons circulate around them in their orbitals.
Option b. is given as “Protons and neutrons”.
The “protons and neutrons” are found in the nucleus of an atom. Hence, the correct answer is option b.
Reason for incorrect answer:
Option a. is given as “Protons and electrons”.
The electrons are found in the orbitals present outside the nucleus. The protons and neutrons are present inside the nucleus. Hence, option a. is incorrect.
Option c. is given as, “DNA and RNA”.
DNA and RNA are made up of a number of atoms and they are found in the nucleus of the cell, not in the nucleus of the atom. So, the possibility of the presence of DNA and RNA inside the atom nucleus is negligible. Hence, option c. is incorrect.
Option d. is given as “Neutrons and electrons”.
Electrons are present on the orbitals and they surround the nucleus of an atom in their respective energy levels. The protons and neutrons are present inside the nucleus. Hence, option d. is incorrect.
Option e. is given as, “DNA only”.
The DNA stands for “deoxyribonucleic acid”. Presence of DNA molecule is found in case of the cellular nucleus, not in the atom nucleus. Hence, option e. is incorrect.
Hence, the options a., c., d., and e. are incorrect.
Inside the nucleus of an atom, the “protons and neutrons” are found.
Want to see more full solutions like this?
Chapter 2 Solutions
Biology
Additional Science Textbook Solutions
Biological Science (6th Edition)
Campbell Essential Biology (7th Edition)
HUMAN ANATOMY
Biology: Life on Earth with Physiology (11th Edition)
Genetics: From Genes to Genomes
General, Organic, and Biological Chemistry: Structures of Life (5th Edition)
- Species Interactions Explain how predators, prey and scavengers interact. Explain whether predators and scavengers are necessary or beneficial for an ecosystem.arrow_forwardmagine that you are conducting research on fruit type and seed dispersal. You submitted a paper to a peer-reviewed journal that addresses the factors that impact fruit type and seed dispersal mechanisms in plants of Central America. The editor of the journal communicates that your paper may be published if you make ‘minor revisions’ to the document. Describe two characteristics that you would expect in seeds that are dispersed by the wind. Contrast this with what you would expect for seeds that are gathered, buried or eaten by animals, and explain why they are different. (Editor’s note: Providing this information in your discussion will help readers to consider the significance of the research).arrow_forwardWhat is the difference between Uniporters, Symporters and Antiporters? Which of these are examples of active transport?arrow_forward
- What are Amyloid Fibrils? What biological functions are these known to perform?arrow_forwardHow do histamine and prostaglandins help in the mobilization of leukocytes to an injury site? What are chemotactic factors? How do they affect inflammation process?arrow_forwardCompare and contrast neutrophils and macrophages. Describe two ways they are different and two ways they are similar.arrow_forward
- Describe the effects of three cytokines (not involved in the initial inflammation response). What cells release them?arrow_forwardDescribe activation of helper T cells or cytotoxic T cellsarrow_forwardCompare and contrast MHC 1 and MHC 2. Describe two way they are different and two ways they similar including how they are used in antigen presentation.arrow_forward