NLN NEX ENTRANCE EXAM (ACTUAL EXAM) WITH
REVISED EXPERT RATIONALES AND CERTIFIED
ANSWERS GRADED A+ | GUARANTEED 100 %
PASS | 2025 – 2026 | WITH OVER 250
QUESTIONS | BRANDNEW!!!!!
A bacterium reproduces asexually by _______.
Correct Answer: binary fission
Rationale:
Binary fission is the process where one bacterial cell divides into two identical daughter cells
after DNA replication and membrane separation.
Small circular DNA molecules in bacteria are called _______.
Correct Answer: plasmids
Rationale:
Plasmids carry extra genetic information like antibiotic resistance and replicate
independently of chromosomal DNA.
Cell processes such as glycolysis and protein synthesis occur in the _______.
Correct Answer: cytoplasm
Rationale:
The cytoplasm is the site of many metabolic reactions and protein production in cells.
The organelle responsible for ATP production during aerobic respiration is the _______.
Correct Answer: mitochondria
Rationale:
Mitochondria generate ATP through oxidative phosphorylation, making them the
“powerhouse” of the cell.
,Proteins that allow water-soluble substances to pass through membranes are called _______
proteins.
Correct Answer: channel
Rationale:
Channel proteins form pores that allow specific molecules or ions to move across
membranes.
Proteins that use ATP to move substances across membranes are called _______ proteins.
Correct Answer: transport
Rationale:
Transport proteins actively move substances against concentration gradients using energy.
Cell structures that transmit signals from hormones are _______ proteins.
Correct Answer: receptor
Rationale:
Receptor proteins bind signaling molecules and trigger intracellular responses.
Proteins that transfer electrons during cellular respiration are _______ proteins.
Correct Answer: electron transfer
Rationale:
These proteins participate in the electron transport chain to generate ATP.
Cell junctions that provide strong mechanical attachment between cells are _______.
Correct Answer: desmosomes
Rationale:
Desmosomes connect cells in tissues exposed to stretching, like skin and heart muscle.
Cell junctions that form a waterproof seal between cells are _______.
Correct Answer: tight junctions
,Rationale:
Tight junctions prevent leakage between cells in epithelial layers.
Cell junctions that allow communication between adjacent cells are _______.
Correct Answer: gap junctions
Rationale:
Gap junctions allow ions and small molecules to pass directly between cells.
Movement of particles from high to low concentration is called _______.
Correct Answer: diffusion
Rationale:
Diffusion is passive movement down a concentration gradient.
Movement of water across a membrane is called _______.
Correct Answer: osmosis
Rationale:
Osmosis is diffusion of water through a semipermeable membrane.
Diffusion of solutes through protein channels is called _______ diffusion.
Correct Answer: facilitated
Rationale:
Facilitated diffusion uses transport proteins without energy.
Chromosomes pair and separate in meiosis I during _______.
Correct Answer: homologous pairing (synapsis)
Rationale:
Homologous chromosomes align and separate during meiosis I.
Chromatids separate during _______.
Correct Answer: meiosis II
, Rationale:
Sister chromatids separate in the second meiotic division.
Crossing over occurs during _______ of meiosis I.
Correct Answer: prophase I
Rationale:
Genetic recombination increases variation during this stage.
Agents that cause DNA mutations are called _______.
Correct Answer: mutagens
Rationale:
Mutagens include radiation and chemicals that damage DNA.
Short projections that receive signals on neurons are _______.
Correct Answer: dendrites
Rationale:
Dendrites receive incoming signals toward the cell body.
Long projections that transmit impulses away from the neuron are _______.
Correct Answer: axons
Rationale:
Axons carry action potentials to target cells.
Support tissue that provides structure and protection is _______ tissue.
Correct Answer: connective
Rationale:
Connective tissue supports organs and binds structures.
Tissue that covers body surfaces is _______ tissue.
Correct Answer: epithelial
REVISED EXPERT RATIONALES AND CERTIFIED
ANSWERS GRADED A+ | GUARANTEED 100 %
PASS | 2025 – 2026 | WITH OVER 250
QUESTIONS | BRANDNEW!!!!!
A bacterium reproduces asexually by _______.
Correct Answer: binary fission
Rationale:
Binary fission is the process where one bacterial cell divides into two identical daughter cells
after DNA replication and membrane separation.
Small circular DNA molecules in bacteria are called _______.
Correct Answer: plasmids
Rationale:
Plasmids carry extra genetic information like antibiotic resistance and replicate
independently of chromosomal DNA.
Cell processes such as glycolysis and protein synthesis occur in the _______.
Correct Answer: cytoplasm
Rationale:
The cytoplasm is the site of many metabolic reactions and protein production in cells.
The organelle responsible for ATP production during aerobic respiration is the _______.
Correct Answer: mitochondria
Rationale:
Mitochondria generate ATP through oxidative phosphorylation, making them the
“powerhouse” of the cell.
,Proteins that allow water-soluble substances to pass through membranes are called _______
proteins.
Correct Answer: channel
Rationale:
Channel proteins form pores that allow specific molecules or ions to move across
membranes.
Proteins that use ATP to move substances across membranes are called _______ proteins.
Correct Answer: transport
Rationale:
Transport proteins actively move substances against concentration gradients using energy.
Cell structures that transmit signals from hormones are _______ proteins.
Correct Answer: receptor
Rationale:
Receptor proteins bind signaling molecules and trigger intracellular responses.
Proteins that transfer electrons during cellular respiration are _______ proteins.
Correct Answer: electron transfer
Rationale:
These proteins participate in the electron transport chain to generate ATP.
Cell junctions that provide strong mechanical attachment between cells are _______.
Correct Answer: desmosomes
Rationale:
Desmosomes connect cells in tissues exposed to stretching, like skin and heart muscle.
Cell junctions that form a waterproof seal between cells are _______.
Correct Answer: tight junctions
,Rationale:
Tight junctions prevent leakage between cells in epithelial layers.
Cell junctions that allow communication between adjacent cells are _______.
Correct Answer: gap junctions
Rationale:
Gap junctions allow ions and small molecules to pass directly between cells.
Movement of particles from high to low concentration is called _______.
Correct Answer: diffusion
Rationale:
Diffusion is passive movement down a concentration gradient.
Movement of water across a membrane is called _______.
Correct Answer: osmosis
Rationale:
Osmosis is diffusion of water through a semipermeable membrane.
Diffusion of solutes through protein channels is called _______ diffusion.
Correct Answer: facilitated
Rationale:
Facilitated diffusion uses transport proteins without energy.
Chromosomes pair and separate in meiosis I during _______.
Correct Answer: homologous pairing (synapsis)
Rationale:
Homologous chromosomes align and separate during meiosis I.
Chromatids separate during _______.
Correct Answer: meiosis II
, Rationale:
Sister chromatids separate in the second meiotic division.
Crossing over occurs during _______ of meiosis I.
Correct Answer: prophase I
Rationale:
Genetic recombination increases variation during this stage.
Agents that cause DNA mutations are called _______.
Correct Answer: mutagens
Rationale:
Mutagens include radiation and chemicals that damage DNA.
Short projections that receive signals on neurons are _______.
Correct Answer: dendrites
Rationale:
Dendrites receive incoming signals toward the cell body.
Long projections that transmit impulses away from the neuron are _______.
Correct Answer: axons
Rationale:
Axons carry action potentials to target cells.
Support tissue that provides structure and protection is _______ tissue.
Correct Answer: connective
Rationale:
Connective tissue supports organs and binds structures.
Tissue that covers body surfaces is _______ tissue.
Correct Answer: epithelial
