FREE BIOLOGY AND STUDY GAMES ABOUT CH 2 BIOLOGY

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FREE BIOLOGY AND STUDY GAMES ABOUT CH 2 BIOLOGY

TEST Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -40 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: The attraction among molecules of different substrates is called...

Answer:

Adhesion

Question 2: The two types of nucleic acids are...

Answer:

DNA and RNA Question 3: Chemical reactions change substances into different substances by...

Answer:

Breaking and forming chemical bonds

Question 4: A Cell contains...

Answer:

Thousands of different kinds of enzymes each promoting a different chemical reaction

Question 5: DNA and RNA are two types of...

Answer:

Nucleic Acids Question 6: The digestive enzyme pepsin works with hydrochloric acid to break down proteins in the stomach. pepsin probably works best in a PH of...

Answer:

3

Question 7: Nonpolar molecules have...

Answer:

No negative or positive poles

Question 8: Which phrase best describes an exothermic chemical reaction?

Answer:

Releases more energy than it absorbs Question 9: T/F:Organic compounds contain carbon atoms are covalently bonded to other elements typically hydrogen oxygen and other carbon atoms

Answer:

True

Question 10: The specific reactants that an enzyme acts on are called...

Answer:

Substrates Question 11: Which of the following organic molecules are most closely related to lipids amino acids,fatty acids,nucleotide,sugars

Answer:

Fatty acids

Question 12: The chemical formula shows the...

Answer:

Kinds of elements found in the Compound

Question 13: Which of the following organic molecules are classified as carbohydrates amino acids fatty acids nucleotide sugars

Answer:

Sugars Question 14: What is the following is not organic macromolecule carbohydrates ice lipids nucleic acid

Answer:

Ice Question 15: Which of the following is not a lipid saturated fat, starch, cholesterol, earwax

Answer:

Starch

Question 16: A solution with a high concentration of Hydrogen ions is...

Answer:

Very acidic

Question 17: Why is water necessary to your body?

Answer:

It dissolves and transports substances Question 18: True or false enzymes speed up a chemical reaction by increasing the activation energy of the reaction

Answer:

False Question 19: True or False:The ability of water to retain heat helps cells maintain Homeostasis

Answer:

True

Question 20: Lipids are...

Answer:

Nonpolar molecules

Question 21: Polysaccharides are...

Answer:

Carbohydrates

Question 22: Enzymes affect chemical reactions in living organisms by...

Answer:

Weakening bonds in reactants Question 23: True or false: DNA stores hereditary information that can be used to make proteins

Answer:

True

Question 24: Liquid fats called oils contain...

Answer:

mostly unsaturated fatty acids Question 25: Hydrogen bonds can form between regions of polar molecules that are...

Answer:

Oppositely charged Question 26: T/F:Nonpolar molecules dissolve well in water

Answer:

False

Question 27: Acidic solutions have a pH that is...

Answer:

Less than seven

Question 28: all Organic compounds contain the element...

Answer:

Carbon