Biology Flashcards

Which of the following is the primary structure of a protein?

Answer: The sequence of amino acids

The primary structure of a protein is the linear sequence of amino acids in its polypeptide chain.

In which phase of the cell cycle does DNA replication occur?

Answer: S phase

DNA replication occurs during the S phase (synthesis phase) of the cell cycle.

Which organelle is responsible for producing ATP through oxidative phosphorylation?

Answer: Mitochondrion

The mitochondrion is responsible for producing ATP through oxidative phosphorylation in the process of cellular respiration.

What is the function of ribosomes in the cell?

Answer: Protein synthesis

Ribosomes are responsible for synthesizing proteins by translating messenger RNA.

Which of the following best describes the process of osmosis?

Answer: Movement of water from an area of low solute concentration to high solute concentration

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Which of the following statements about enzymes is true?

Answer: Enzymes decrease the activation energy of a reaction

Enzymes function by lowering the activation energy required for a reaction to occur, thereby speeding up the reaction.

What is the primary role of chlorophyll in photosynthesis?

Answer: Absorbing light energy

Chlorophyll is the pigment in plants that absorbs light energy, which is then used to convert carbon dioxide and water into glucose during photosynthesis.

Which of the following processes results in the formation of gametes?

Answer: Meiosis

Meiosis is the process that results in the formation of gametes (sperm and eggs), reducing the chromosome number by half.

What is the main function of the Golgi apparatus in the cell?

Answer: Modifying, sorting, and packaging proteins for secretion

The Golgi apparatus modifies, sorts, and packages proteins and lipids for secretion or delivery to other organelles.

Which type of bond is formed between the oxygen and hydrogen atoms within a single water molecule?

Answer: Covalent bond

The oxygen and hydrogen atoms within a single water molecule are held together by covalent bonds, where electrons are shared between atoms.

Which of the following statements about genetic mutations is true?

Answer: Mutations can be caused by environmental factors

Mutations can be caused by various factors, including environmental influences such as radiation, chemicals, and viruses.