Question: of 50: When an ionic salt is dissolved in water, the ions CO₃²⁻ and K⁺ are formed. Which of the following is the formula for the salt?
Answer Choices:
KCO₃
K₂CO₃
K₃CO₂
K(CO₃)₂
Answer: K₂CO₃
Question: of 50: Which of the following describes the process by which solid carbon dioxide (dry ice) turns directly into carbon dioxide gas?
Answer Choices:
Evaporation
Condensation
Sublimation
Deposition
Answer: Sublimation
Question: of 50: Which of the following elements has the smallest atomic radius?
Answer Choices:
Sn
Si
C
Ge
Answer: C
Question: of 50: A cell is placed in a hypertonic solution. Which of the following describes the resulting osmosis?
Answer Choices:
The net flow of water into and out of the cell is zero.
There is a net flow of water into the cell.
There is no flow of water.
There is a net flow of water out of the cell.
Answer: There is a net flow of water out of the cell.
Question: Which of the following terms describes the removal of metabolic waste from the body?
Answer Choices:
Anabolism
Excretion
Catabolism
Secretion
Answer: Excretion
Question: of 50: What is the main function of hemoglobin in the body?
Answer Choices:
To transport oxygen to cells and tissues.
To fight off infections in the immune system.
To act as a catalyst in the breakdown of food.
To store glucose for energy production.
Answer: To transport oxygen to cells and tissues.
Question: of 50: An equal mass of which of the following states of matter could completely fill either a 100 mL or 500 mL container?
Answer Choices:
Gas
Liquid
Mixture
Solid
Answer: Gas
Question: of 50: Mutations in which of the following types of cells can be inherited by offspring?
Answer Choices:
Ovarian
Neural
Endocrine
Muscle
Answer: Ovarian
Question: of 50: Which of the following pancreatic secretions digests starch into disaccharides?
Answer Choices:
Trypsin
Amylase
Chymotrypsin
Lipase
Answer: Amylase
Question: of 50: Which of the following bases is found in RNA but is absent from DNA?
Answer Choices:
Uracil
Thymine
Cytosine
Adenine
Answer: Uracil
Question: of 50: Which of the following structures is responsible for producing bile in the digestive system?
Answer Choices:
Liver
Gallbladder
Pancreas
Stomach
Answer: Liver
Question: of 50: Which of the following parts of the central nervous system releases chemicals that regulate the pituitary gland?
Answer Choices:
Cerebellum
Hypothalamus
Spinal cord
Thalamus
Answer: Hypothalamus
Question: of 50: A mutation of a portion of a DNA molecule changed the resulting mRNA sequence from AUU-GGG-UUC to CUU-GGG-UUC. Using the codon table below, predict the resulting amino acid sequence.
Answer Choices:
From Ile-Gly-Phe to Leu-Gly-Phe
From Met-Gly-Leu to Leu-Gly-Phe
From Ile-Gly-Ser to Leu-Gly-Phe
From Leu-Gly-Phe to Met-Gly-Leu
Answer: From Ile-Gly-Phe to Leu-Gly-Phe
Question: of 50: Which of the following body cavities is subdivided into the thoracic and abdominopelvic cavities?
Answer Choices:
Vertebral
Cranial
Dorsal
Ventral
Answer: Ventral
Question: A researcher collects high-resolution photographs of the Earth taken from outer space at annual intervals for the last decade. This data would be most useful to analyze which of the following?
Answer Choices:
Migration patterns of large whales
Weather patterns during hurricanes
Human movement during crises
Deforestation in the rainforest
Answer: Deforestation in the rainforest
Question: of 50: What is the primary purpose of the myelin sheath on neurons?
Answer Choices:
To slow down the transmission of electrical signals.
To protect the axon and speed up signal transmission.
To release neurotransmitters into the synaptic cleft.
To help with the absorption of nutrients.
Answer: To protect the axon and speed up signal transmission.
Question: of 50: Which of the following structures is a flap of cartilage that prevents the movement of food into the trachea?
Answer Choices:
Larynx
Glottis
Pharynx
Epiglottis
Answer: Epiglottis
Question: of 50: Which of the following is an example of active transport?
Answer Choices:
Loss of water from a cell in a hypertonic solution
Movement of a substance from an area of high concentration to an area of low concentration
Aquaporins in kidney cells that help concentrate urine
Movement of sodium and potassium across the cell membrane against their concentration gradients
Answer: Movement of sodium and potassium across the cell membrane against their concentration gradients
Question: of 50: Which of the following accurately describes a neutralization reaction?
Answer Choices:
An acid reacts with a base to form a salt and water.
A gas reacts with a metal to form an acid.
An alkali reacts with water to form a hydroxide.
A salt reacts with a gas to form water and a base.
Answer: An acid reacts with a base to form a salt and water.