Nas 2 TCC Actual Exam Newest 2025/2026 Complete Questions And
Correct Detailed Answers |Already Graded A+||Already Graded A+
Purpose of the scientific method - ANSWER=To solve or answer a question. Or to test a
hypothesis
Steps of the scientific method - ANSWER=Question, hypothesis, experiment, record,
observe/analyze, conclude, repeat
Independent Variable - ANSWER=A variable that stands alone and isn't changed by other
variables. Example: age
Dependent Variable - ANSWER=Variable that is dependent on other factors. Example test score.
Control Group - ANSWER=Does not receive treatment in the experiment
Experimental Groups - ANSWER=Group exposed to changes of the independent variable
Levels of organization - ANSWER=Organelle
Cell
Tissue
Organ
Organ System
Organism
Requirements for life (5) - ANSWER=Cellular Organization
Reproduction
,Metabolism
Homeostasis
Heredity
Response to stimuli
Growth and development
Adaptation through evolution
Survival Needs - ANSWER=Food, oxygen, water, body temp,
Homeostasis - ANSWER=Constant internal physical and chemical conditions that organisms have
to maintain
Receptor - ANSWER=Senses environment stimulus and sends info to the control center
Control Center - ANSWER=Where the hypothalamus is located and the signals effector
Effector - ANSWER=Responds to stimuli
Example: Muscle Contracting
Electron - ANSWER=Negative charge particle, outer shell
Proton - ANSWER=Positive, nucleus
Neutrons - ANSWER=no charge, nucleus
Ionic Bond - ANSWER=Chemical bond formed between two ions that are opposite charges,
atom gives up one or more electrons to another atom
, Covalent Bond - ANSWER=Type of bond that has sharing electron pairs between atoms.
Hydrogen Bond - ANSWER=weak bond result of attraction between proton and electronegative
atom of another
Polar Bond - ANSWER=pair of electrons unequally shared between two atoms
Nonpolar Covalent Bond - ANSWER=two atoms share a pair of electrons with each other
Enzymes - ANSWER=catalyze chemical reactions by lowering activation energy barriers and
converting substrate molecules to products
Substrate - ANSWER=Reactant acted upon by an enzyme
Active Site - ANSWER=part of an enzyme to which substrates bind and where a reaction is
catalyzed
Decomposition - ANSWER=Single compound breaks down into two or more elements or new
compounds
Heat, light, electricity
Synthesis - ANSWER=multiple reactants combine to form a single product
Exchange - ANSWER=any class of reactions between two substances that involves an exchange
of one or more ionic components (positive and negative charges)
Correct Detailed Answers |Already Graded A+||Already Graded A+
Purpose of the scientific method - ANSWER=To solve or answer a question. Or to test a
hypothesis
Steps of the scientific method - ANSWER=Question, hypothesis, experiment, record,
observe/analyze, conclude, repeat
Independent Variable - ANSWER=A variable that stands alone and isn't changed by other
variables. Example: age
Dependent Variable - ANSWER=Variable that is dependent on other factors. Example test score.
Control Group - ANSWER=Does not receive treatment in the experiment
Experimental Groups - ANSWER=Group exposed to changes of the independent variable
Levels of organization - ANSWER=Organelle
Cell
Tissue
Organ
Organ System
Organism
Requirements for life (5) - ANSWER=Cellular Organization
Reproduction
,Metabolism
Homeostasis
Heredity
Response to stimuli
Growth and development
Adaptation through evolution
Survival Needs - ANSWER=Food, oxygen, water, body temp,
Homeostasis - ANSWER=Constant internal physical and chemical conditions that organisms have
to maintain
Receptor - ANSWER=Senses environment stimulus and sends info to the control center
Control Center - ANSWER=Where the hypothalamus is located and the signals effector
Effector - ANSWER=Responds to stimuli
Example: Muscle Contracting
Electron - ANSWER=Negative charge particle, outer shell
Proton - ANSWER=Positive, nucleus
Neutrons - ANSWER=no charge, nucleus
Ionic Bond - ANSWER=Chemical bond formed between two ions that are opposite charges,
atom gives up one or more electrons to another atom
, Covalent Bond - ANSWER=Type of bond that has sharing electron pairs between atoms.
Hydrogen Bond - ANSWER=weak bond result of attraction between proton and electronegative
atom of another
Polar Bond - ANSWER=pair of electrons unequally shared between two atoms
Nonpolar Covalent Bond - ANSWER=two atoms share a pair of electrons with each other
Enzymes - ANSWER=catalyze chemical reactions by lowering activation energy barriers and
converting substrate molecules to products
Substrate - ANSWER=Reactant acted upon by an enzyme
Active Site - ANSWER=part of an enzyme to which substrates bind and where a reaction is
catalyzed
Decomposition - ANSWER=Single compound breaks down into two or more elements or new
compounds
Heat, light, electricity
Synthesis - ANSWER=multiple reactants combine to form a single product
Exchange - ANSWER=any class of reactions between two substances that involves an exchange
of one or more ionic components (positive and negative charges)
