metabolism practice

What is metabolism?

• The body's use of molecules for energy and growth

• A group of atoms joined together

• A molecule that organisms use to release energy

• The building blocks of proteins

Answer explanation

Metabolism refers to the body's processes that convert molecules from food into energy and building blocks for growth. This makes the first choice correct, as it encompasses the overall function of metabolism.

Tags

NGSS.MS-LS1-7

What is a molecule?

• The body's use of molecules for energy and growth

• A group of atoms joined together in a particular way

• A molecule that organisms use to release energy

• The building blocks of proteins

Answer explanation

A molecule is defined as a group of atoms joined together in a particular way, which distinguishes it from other concepts like energy use or protein building blocks.

Tags

NGSS.MS-PS1-1

Glucose is a molecule that organisms can use to release energy, and that is made of ________, ________, and ________ atoms.

• carbon, hydrogen, and oxygen

• carbon, nitrogen, and oxygen

• hydrogen, nitrogen, and sulfur

• carbon, phosphorus, and hydrogen

Answer explanation

Glucose is a simple sugar composed of carbon, hydrogen, and oxygen atoms. This composition is essential for its role in energy release in organisms, making 'carbon, hydrogen, and oxygen' the correct choice.

Tags

NGSS.MS-PS1-1

Oxygen is a molecule that organisms get from the air or water around them and use to release energy.

• True

• False

Answer explanation

True. Oxygen is essential for organisms as it is used in cellular respiration to release energy from food, which they obtain from the air or water.

Tags

NGSS.MS-LS2-3

Amino acids are molecules that are the building blocks of ________.

• proteins

• carbohydrates

• lipids

• nucleic acids

Answer explanation

Amino acids are essential molecules that serve as the building blocks of proteins. They link together to form protein structures, which are crucial for various biological functions.

Tags

NGSS.MS-LS3-1

With diabetes, the body can’t move ________ into the cells properly.

• glucose

• oxygen

• protein

• calcium

Answer explanation

With diabetes, the body struggles to move glucose into the cells due to insulin resistance or deficiency. This leads to high blood sugar levels, making glucose the correct answer.

Tags

NGSS.HS-LS1-7

List these molecules from smallest to largest: glucose molecule, starch molecule, protein molecule, carbon dioxide molecule, water molecule, amino acid molecule, oxygen molecule.

• water molecule, oxygen molecule, carbon dioxide molecule, glucose molecule, amino acid molecule, protein molecule, starch molecule

• oxygen molecule, water molecule, carbon dioxide molecule, amino acid molecule, glucose molecule, protein molecule, starch molecule

• carbon dioxide molecule, water molecule, oxygen molecule, glucose molecule, amino acid molecule, protein molecule, starch molecule

• water molecule, carbon dioxide molecule, oxygen molecule, amino acid molecule, glucose molecule, protein molecule, starch molecule

Answer explanation

The correct order from smallest to largest is: water (H2O), oxygen (O2), carbon dioxide (CO2), glucose (C6H12O6), amino acids (building blocks of proteins), proteins (polymers of amino acids), and starch (polymers of glucose).

Tags

NGSS.MS-PS1-1

Cells can only use molecules that are small enough to enter a cell.

• True

• False

Answer explanation

True. Cells can only utilize small molecules that can pass through their membranes. Larger molecules cannot enter, limiting the types of substances cells can use for energy and building materials.

What is a system?

• A group of atoms joined together

• The body's use of molecules for energy

• A set of interacting parts forming a complex whole

• The building blocks of proteins

Answer explanation

A system is defined as a set of interacting parts forming a complex whole, which captures the essence of how different components work together, unlike the other options that describe specific elements or processes.

The doctor said my anemia was probably caused by not getting enough ______ in the food I was eating.

• iron

• vitamin C

• calcium

• fiber

Answer explanation

Anemia is often caused by a deficiency in iron, which is essential for producing hemoglobin in red blood cells. The other options, while important for health, do not directly cause anemia like iron does.