Atoms interact via covalent or ionic bonds to form stable chemical structures referred to as__________?
Show answer Hide answer
Answer: B. A molecule
Explanation
Chemical bonds like covalent and ionic linkages hold multiple atoms together into stable molecular units. A molecule represents the smallest fundamental unit of a chemical compound retaining its properties. This bonding fulfills the valence electron requirements of the participating individual atoms. Atoms share or transfer valence electrons to achieve lower energy states and greater chemical stability. Covalent bonds involve electron sharing, while ionic bonds rely on electrostatic attractions between ions. The resulting molecular structures form the basis of all organic and inorganic chemical substances.
Pharmacology and biochemistry rely heavily on understanding how molecular bonding dictates biological function. Drug molecules interact with cellular receptors based on their specific chemical bonds and shapes. Cellular metabolism continuously builds and breaks molecules to sustain life processes in organisms. An organ is a complex multicellular structure composed of multiple interacting tissues rather than atoms. Tissue is an aggregation of similar cells working together to perform a specific bodily function. Both a and c is incorrect because neither organs nor tissues are formed directly by atomic bonding.
Related questions
Q1. Air spaces may occupy up to _________ of a leaf's internal volume?
Show answer Hide answer
Answer: C. 40%
Spongy mesophyll tissue contains extensive intercellular air spaces that occupy significant leaf volume. These air spaces can make up as much as 40% of the total internal leaf volume. Such structural porosity is vital fo...
Q2. Mad cow disease is linked to an infectious agent of contentious classification known as_____________?
Show answer Hide answer
Answer: D. Prion
Mad cow disease is caused by prions, which are abnormally folded infectious protein particles. These infectious agents lack nucleic acids and replicate by inducing normal proteins to misfold. Prions resist standard steri...
Q3. Deoxygenated blood flows into the ________________ region of the heart ?
Show answer Hide answer
Answer: A. Posterior
Deoxygenated blood returning from systemic circulation enters the posterior or inferior region of the heart. Specifically, the inferior vena cava empties deoxygenated blood into the posterior part of the right atrium. Th...
Q4. Oxygenated blood is transported from the lungs to the heart via_______?
Show answer Hide answer
Answer: C. Pulmonary vein
Pulmonary veins transport oxygenated blood directly from the respiratory surfaces of the lungs. This oxygen-rich blood flows from the pulmonary capillaries into the left atrium of the heart. These specialized veins repre...
Q5. The biological subdivision dedicated to investigating biochemical reactions within living systems is designated_________________?
Show answer Hide answer
Answer: B. Biochemistry
Biochemistry is the scientific discipline dedicated to investigating chemical substances in living systems. This field explores the complex molecular reactions and metabolic pathways operating inside cells. It bridges bi...
Q6. The most expansive invertebrate phylum is_________?
Show answer Hide answer
Answer: B. Insects
Insects constitute the largest and most diverse class within the invertebrate phylum Arthropoda. They represent more than half of all known living organism species described on Earth. Their evolutionary success stems fro...