Free NSAA Biology Questions and Answers
Which of the following best describes the process of osmosis?
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.
In which phase of the cell cycle does DNA replication occur?
DNA replication occurs during the S phase (synthesis phase) of the cell cycle.
Which of the following processes results in the formation of gametes?
Meiosis is the process that results in the formation of gametes (sperm and eggs), reducing the chromosome number by half.
Which of the following is the primary structure of a protein?
The primary structure of a protein is the linear sequence of amino acids in its polypeptide chain.
Which of the following statements about enzymes is true?
Enzymes function by lowering the activation energy required for a reaction to occur, thereby speeding up the reaction.
Which organelle is responsible for producing ATP through oxidative phosphorylation?
The mitochondrion is responsible for producing ATP through oxidative phosphorylation in the process of cellular respiration.
What is the primary role of chlorophyll in photosynthesis?
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 statements about genetic mutations is true?
Mutations can be caused by various factors, including environmental influences such as radiation, chemicals, and viruses.
Which type of bond is formed between the oxygen and hydrogen atoms within a single water molecule?
The oxygen and hydrogen atoms within a single water molecule are held together by covalent bonds, where electrons are shared between atoms.
What is the main function of the Golgi apparatus in the cell?
The Golgi apparatus modifies, sorts, and packages proteins and lipids for secretion or delivery to other organelles.
What is the function of ribosomes in the cell?
Ribosomes are responsible for synthesizing proteins by translating messenger RNA.
