Correct Answer: A

Rationale: Proteins are indeed polymers made up of amino acids. Amino acids are the building blocks of proteins, where each protein has a unique sequence of amino acids that determines its structure and function. Phospholipids, carbohydrates, and fatty acids are not molecules that make up proteins. Phospholipids are the main components of cell membranes, carbohydrates are sugars used for energy and structural purposes, and fatty acids are building blocks of lipids.

Correct Answer: A

Rationale: Taxonomy is the science of naming, defining, and classifying groups of biological organisms based on shared characteristics. Physiology (choice
B) is the study of the functions and processes of living organisms, not classification. Botany (choice
C) is the study of plants, while Zoology (choice
D) is the study of animals.
Therefore, the correct answer is Taxonomy (choice
A).

Correct Answer: B

Rationale: Water is a polar molecule due to an uneven distribution of electrons, allowing it to form hydrogen bonds. This property makes water both cohesive (attracted to itself) and adhesive (attracted to other substances).
Choice A is incorrect because water is not corrosive; rather, it is a solvent.

Choices C and D are incorrect as they do not describe the cohesive and adhesive properties of water.

Correct Answer: B

Rationale: The correct answer is B, Atom. An atom is the smallest unit of matter that retains the properties of an element.
Choice A, Micromolecule, is incorrect because molecules are composed of atoms bonded together, making them larger than individual atoms.
Choice C, Organelle, is incorrect as organelles are structures within cells, not the basic unit of matter.
Choice D, Molecule, is incorrect as molecules are made up of atoms bonded together, so they are not the smallest unit of matter.

Correct Answer: A

Rationale: The correct answer is RNA. RNA, particularly mRNA, serves as the messenger that carries genetic information from DNA to the ribosome, where proteins are synthesized. Proteins (choice
B) are not the genetic code's messenger; they are synthesized based on the information carried by RNA. DNA (choice
C) stores the genetic information but does not directly act as the messenger. Carbohydrates (choice
D) are not involved in transmitting genetic information.