nln pax biology questions and answers
2026\2027 A+ Grade
Cell
- correct answer smallest living unit and the basic unit of function and structure for all living things.
Nucleus
- correct answer contains genetic information or DNA, controls the activities of the cell.
DNA -
- correct answer Deoxyribonucleic Acid - genetic information.
Plasma or Cell Membrane
- correct answer Semipermeable membrane that separates the contents of the cell from the
surrounding fluids (interstitial fluid).
Interstitial Fluid
- correct answer contains substances such as aminoacids, sugars, fatty acids, hormones,
neurotransmitters and salts.
Selectively permeable or semi permeable membrane
- correct answer refers to the selective nature of the plasma membrane. It contains pores and channels
that allow only particles of the right size or right chemical nature to pass through. Additionally plasma
membrane contains receptors that bind with specific substances, thus allowing special entry or signals
to the cell to perform a certain activity.
Cytoplasm
- correct answer Fluid matrix found between the plasma membrane and the nucleus that act as
scaffolding for the organelles.
Organelles
- correct answer or "little organs" are specialized units in the cell that perform certain functions.
, Mitochondria
- correct answer are the locations for cellular respiration that is the conversion of food to energy at the
cellular level, thus the mitochondria are the sites of energy production and most of its ATP.
ATP
- correct answer adenosine triphosphate - chemical the cell uses to store and transfer energy within
itself.
Ribosome
- correct answer site of protein synthesis in the cell.
Endoplasmatic Reticulum(ER)
- correct answer serves as means of transport within the cell and is made up of many channels.
Rough ER
- correct answer named for the fact that it has ribosomes on its surface, serves to store and deliver
proteins made by the attached ribosomes.
Smooth ER
- correct answer Free of ribosomes, found in a variety of cells, performs varying functions in different
cells, including the storage of enzymes and minerals and the folding of proteins, among other things. It is
thought to be involved in the detoxification of chemicals and the metabolism of fats.
Golgi Complex
- correct answer modifies and packages proteins destined for use in the cell or for export from the cell.
Lysosome
- correct answer sacs that contain strong digestive enzymes, responsible for digesting cell structures that
are no longer living or that are malfunctioning and for digesting waste.
Cell wall
- correct answer exclusive to plant cells and it involves the plant cells, essential for their protection,
maintenance of shape and water balance.
2026\2027 A+ Grade
Cell
- correct answer smallest living unit and the basic unit of function and structure for all living things.
Nucleus
- correct answer contains genetic information or DNA, controls the activities of the cell.
DNA -
- correct answer Deoxyribonucleic Acid - genetic information.
Plasma or Cell Membrane
- correct answer Semipermeable membrane that separates the contents of the cell from the
surrounding fluids (interstitial fluid).
Interstitial Fluid
- correct answer contains substances such as aminoacids, sugars, fatty acids, hormones,
neurotransmitters and salts.
Selectively permeable or semi permeable membrane
- correct answer refers to the selective nature of the plasma membrane. It contains pores and channels
that allow only particles of the right size or right chemical nature to pass through. Additionally plasma
membrane contains receptors that bind with specific substances, thus allowing special entry or signals
to the cell to perform a certain activity.
Cytoplasm
- correct answer Fluid matrix found between the plasma membrane and the nucleus that act as
scaffolding for the organelles.
Organelles
- correct answer or "little organs" are specialized units in the cell that perform certain functions.
, Mitochondria
- correct answer are the locations for cellular respiration that is the conversion of food to energy at the
cellular level, thus the mitochondria are the sites of energy production and most of its ATP.
ATP
- correct answer adenosine triphosphate - chemical the cell uses to store and transfer energy within
itself.
Ribosome
- correct answer site of protein synthesis in the cell.
Endoplasmatic Reticulum(ER)
- correct answer serves as means of transport within the cell and is made up of many channels.
Rough ER
- correct answer named for the fact that it has ribosomes on its surface, serves to store and deliver
proteins made by the attached ribosomes.
Smooth ER
- correct answer Free of ribosomes, found in a variety of cells, performs varying functions in different
cells, including the storage of enzymes and minerals and the folding of proteins, among other things. It is
thought to be involved in the detoxification of chemicals and the metabolism of fats.
Golgi Complex
- correct answer modifies and packages proteins destined for use in the cell or for export from the cell.
Lysosome
- correct answer sacs that contain strong digestive enzymes, responsible for digesting cell structures that
are no longer living or that are malfunctioning and for digesting waste.
Cell wall
- correct answer exclusive to plant cells and it involves the plant cells, essential for their protection,
maintenance of shape and water balance.
