Life Science Chapter 2 Quiz

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Quizzes Created: 1 | Total Attempts: 526

Questions: 10 | Attempts: 526 | Updated: Mar 21, 2023

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This quiz is for Chapter 2 in your life Science Book.

Questions and Answers

1.

Which of the following statements about cells is true?
- A.
  
  Cells are the structures that contain all of the materials necessary for life
- B.
  
  Cells are found in all organisms
- C.
  
  Cells are sometimes specialized for particular functions
- D.
  
  All of the above
Correct Answer
D. All of the above

Explanation
The statement "All of the above" is the correct answer because it accurately summarizes the preceding statements. The first statement states that cells contain all the materials necessary for life, which is true as cells are the basic units of life. The second statement states that cells are found in all organisms, which is also true as cells are the building blocks of all living organisms. The third statement states that cells are sometimes specialized for particular functions, which is true as different cells in an organism can have specific roles and functions. Therefore, all three statements are true, making "All of the above" the correct answer.

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2.

Which of the following statements about all living things is true?
- A.
  
  All living things reproduce sexually
- B.
  
  All living things have one or more cells
- C.
  
  All living things must make their own food
- D.
  
  All living things reproduce asexually
Correct Answer
B. All living things have one or more cells

Explanation
All living things have one or more cells because cells are the basic building blocks of life. All living organisms, from single-celled bacteria to complex multicellular organisms, are composed of cells. Cells carry out essential functions necessary for life, such as metabolism, growth, and reproduction. Therefore, it is true that all living things have one or more cells.

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3.

Organisms must have food because
- A.
  
  Food is a source of energy
- B.
  
  Food supplies cells with oxygen
- C.
  
  Organisms never make their own food
- D.
  
  All of the above
Correct Answer
A. Food is a source of energy

Explanation
Food is a source of energy for organisms. When organisms consume food, it is broken down through digestion, and the nutrients are absorbed into the bloodstream. These nutrients, such as carbohydrates, proteins, and fats, are then used by cells to produce energy through cellular respiration. This energy is essential for various biological processes, including growth, repair, and movement. Therefore, food is necessary for organisms to obtain the energy they need to survive and function properly.

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4.

A change in an organism's environment that affects the organism's activities is a
- A.
  
  Response
- B.
  
  Stimulus
- C.
  
  Metabolism
- D.
  
  Producer
Correct Answer
B. Stimulus

Explanation
A stimulus refers to a change in an organism's environment that triggers a response or affects the organism's activities. It can be any external factor such as temperature, light, sound, or chemical substances that elicits a reaction from the organism. This response can be behavioral, physiological, or developmental. The stimulus can either be positive, promoting a response, or negative, inhibiting a response. Therefore, the correct answer is stimulus.

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5.

Organisms store energy in
- A.
  
  Nucleic Acids
- B.
  
  Phospholipids
- C.
  
  Lipids
- D.
  
  Water
Correct Answer
C. Lipids

Explanation
Lipids are molecules that store energy in the body. They are a type of organic compound that includes fats, oils, and waxes. Lipids are an efficient way to store energy because they contain more than twice as much energy as carbohydrates or proteins. When the body needs energy, it can break down lipids through a process called lipid metabolism, releasing the stored energy for use. Therefore, lipids are the correct answer for this question.

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6.

The molecule that contains the information about how to make proteins is
- A.
  
  ATP
- B.
  
  A carbohydrate
- C.
  
  DNA
- D.
  
  A phospholipid
Correct Answer
C. DNA

Explanation
DNA is the correct answer because it carries the genetic information that contains instructions for making proteins. DNA molecules consist of nucleotides, which are made up of a sugar, a phosphate group, and a nitrogenous base. The sequence of these bases in DNA determines the sequence of amino acids in proteins, thus encoding the information needed for protein synthesis. ATP is a molecule that provides energy for cellular processes, carbohydrates are a source of energy, and phospholipids are structural components of cell membranes, but they do not contain the specific information required for protein synthesis.

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7.

The subunits of nucleic acids are
- A.
  
  Nucleotides
- B.
  
  Oils
- C.
  
  Sugars
- D.
  
  Amino acids
Correct Answer
A. Nucleotides

Explanation
Nucleic acids are composed of repeating units called nucleotides. Nucleotides consist of three main components: a sugar molecule (either ribose or deoxyribose), a phosphate group, and a nitrogenous base (adenine, thymine, cytosine, guanine, or uracil). These nucleotides are joined together through phosphodiester bonds to form the backbone of DNA and RNA molecules. Therefore, nucleotides are the correct subunits of nucleic acids.

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8.

Plants store extra sugar as
- A.
  
  Protein
- B.
  
  Starch
- C.
  
  Nucleic acids
- D.
  
  Phospholipids
Correct Answer
B. Starch

Explanation
Plants store extra sugar as starch because starch is a complex carbohydrate made up of multiple glucose units. It is the most common form of stored energy in plants and serves as a reserve for later use. Starch is insoluble in water, allowing it to be stored in plant cells without affecting the osmotic balance. When energy is needed, starch can be broken down into glucose molecules and used for various metabolic processes, such as respiration or synthesis of other molecules.

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9.

Homeostasis means maintaining
- A.
  
  Stable internal conditions
- B.
  
  Varied internal conditions
- C.
  
  Similar offspring
- D.
  
  Varied offspring
Correct Answer
A. Stable internal conditions

Explanation
Homeostasis refers to the ability of an organism to maintain a stable internal environment despite changes in the external environment. This includes regulating factors such as temperature, pH levels, and nutrient balance. By maintaining stable internal conditions, an organism can ensure proper functioning of its cells and organs, allowing it to survive and thrive in its environment.

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10.

Which of the following is NOT a characteristic of living things?
- A.
  
  All living things have cells
- B.
  
  Living things grow and develop
- C.
  
  Living things make their own food
- D.
  
  Living things use energy
Correct Answer
C. Living things make their own food

Explanation
Living things make their own food is not a characteristic of living things. This statement refers to the process of photosynthesis, which is only performed by autotrophic organisms such as plants and some bacteria. While many living things do make their own food, such as plants through photosynthesis, there are also many organisms that cannot produce their own food and rely on consuming other organisms for nutrition. Therefore, making their own food is not a universal characteristic of all living things.

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Current Version
Mar 21, 2023

Quiz Edited by
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Oct 04, 2010

Quiz Created by
Mossd1750

Life Science Chapter 2 Quiz

Which of the following statements about cells is true?

Which of the following statements about all living things is true?

Organisms must have food because

A change in an organism's environment that affects the organism's activities is a

Organisms store energy in

The molecule that contains the information about how to make proteins is

The subunits of nucleic acids are

Plants store extra sugar as

Homeostasis means maintaining

Which of the following is NOT a characteristic of living things?