Life Science Chapter 2 Quiz

2.

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

All living things reproduce sexually
All living things have one or more cells
All living things must make their own food
All living things reproduce asexually

Correct Answer

A. 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.

Rate this question:

3.

Organisms must have food because

Food is a source of energy
Food supplies cells with oxygen
Organisms never make their own food
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.

Rate this question:

4.

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

Response
Stimulus
Metabolism
Producer

Correct Answer

A. 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.

Rate this question:

5.

Organisms store energy in

Nucleic Acids
Phospholipids
Lipids
Water

Correct Answer

A. 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.

Rate this question:

6.

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

ATP
A carbohydrate
DNA
A phospholipid

Correct Answer

A. 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.

Rate this question:

7.

The subunits of nucleic acids are

Nucleotides
Oils
Sugars
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.

Rate this question:

8.

Plants store extra sugar as

Protein
Starch
Nucleic acids
Phospholipids

Correct Answer

A. 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.

Rate this question:

1

9.

Homeostasis means maintaining

Stable internal conditions
Varied internal conditions
Similar offspring
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.

Rate this question:

10.

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

All living things have cells
Living things grow and develop
Living things make their own food
Living things use energy

Correct Answer

A. 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.

Rate this question:

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?