Biology HESI A2 Practice Test

Correct Answer: B

Rationale: The scientist needs 12mL, which is equivalent to 0.012L. Since the bottle holds 12L, it contains more than enough solution. Therefore, choice B is correct. Choice A is incorrect because the scientist needs less than the total amount in the bottle. Choice C is incorrect because the scientist actually has more than enough. Choice D is also incorrect as the scientist does have more than required.

Correct Answer: C

Rationale: The correct answer is C. Antibiotics do not cause more bacteria to grow; in fact, they aim to kill or inhibit the growth of bacteria. Antibiotics interfere with the bacteria's ability to survive by targeting specific processes essential for their growth and reproduction (A). They can affect how bacteria multiply by inhibiting cell wall synthesis, protein synthesis, or DNA replication (B). Lastly, antibiotics specifically target bacteria and do not work on viruses or fungi (D). Therefore, choice C is the only statement that is not true about antibiotics.

Correct Answer: B

Rationale: The correct answer is B: Taxonomy. Taxonomy is the science of classifying organisms based on their physical characteristics and presumed natural relationships. It involves categorizing organisms into different groups to reflect their evolutionary history. Biology (A) is the broader study of living organisms, not specifically focused on classification. Grouping (C) is a generic term and does not encompass the systematic categorization process of taxonomy. Nomenclature (D) refers to the naming of organisms, not their classification based on physical characteristics and relationships.

Correct Answer: B

Rationale: Proteins are the best choice to increase muscle mass and strength because they are essential for muscle repair and growth. Proteins are made up of amino acids, which are the building blocks of muscles. Consuming enough protein provides the body with the necessary nutrients to repair and build muscle tissue. Carbohydrates are primarily for energy, lipids are for long-term energy storage, and nucleic acids are not directly involved in muscle growth. Therefore, proteins are the most suitable option for athletes looking to increase muscle mass and strength.

Correct Answer: B

Rationale: The correct answer is B: They are denoted AA. Homozygous traits mean both alleles are the same, so they are represented by identical letters (AA). Haploid refers to having one set of chromosomes, not relevant here. Choice C (aa) and D (Aa) represent heterozygous traits with different alleles, making them incorrect. Homozygous traits are always represented by the same letter for both alleles.