SOL 2: Life Molecules 2025

A molecule in which opposite ends have opposite electric charges is called .....

• cohesion
• polar molecule
• hydrogen bond
• adhesion

Answer explanation

It is a polar molecule because of the unequal sharing of electrons creating a slightly negative pole and a slightly positive pole in the same molecule.

Tags

NGSS.MS-PS2-3

A bond created by the weak attraction of a slightly positive hydrogen atom to a slightly negative portion of another molecule is called ..........

• polar molecule
• adhesion
• hydrogen bond

Answer explanation

Hydrogen bonds are due to water molecules being polar.

Match the following Properties of Water

• universal solvent

• water molecules attracted to water molecules

• adhesion

• water can absorb a lot of heat before its temperature increases significantly

• cohesion

• can dissolve many substances

• thermal regulator (high specific heat)

• water molceules attracted to other molecules

Tags

NGSS.HS-ESS2-5

Which 2 selections are true regarding capillary action in plants?

• It is caused by invisible strings that pull the water through the stem

• It is caused by cohesion and adhesion of water

• It helps plants absorb sunlight

• It helps bring water up into the roots and to the branches and leaves

Tags

NGSS.MS-LS2-4

Which of the following elements are found in all macromolecules? (Select all that apply).

• 
• 
• 
• 

Tags

NGSS.HS-LS1-6

Match the macromolecule to their monomers (name and image)

Groups:

(a) Carbohydrates

,

(b) Lipids

,

(c) Proteins

,

(d) Nucleic Acids

• monomers= monosaccharides

• 
• monomers= nucleotides

• monomers= amino acids

• 
• monomers= fatty acids and glycerol

• 
• 

A monomer is ​ (a)   building block of a polymer. A polymer is made of ​ (b)   repeating monomers that can be the same or different. Large polymers that are found in living things are called ​ (c)   .

• one
• many
• macromolecules

Tags

HS-LS1-6

Which of the following organic compounds is the main source of energy for living things?

• carbohydrates

• lipids

• nucleic acids

• proteins

Answer explanation

Carbohydrates are the main source of energy for living beings. They are metabolized faster and more efficiently than proteins and lipids, thus providing immediate energy. Nucleic acids, on the other hand, are involved in the genetic information storage, not in the energy production. Hence, among the given options, carbohydrates are the correct answer to the question.

Which macromolecule stores energy, insulates us, and is the main component of the cell membrane?

• lipids

• proteins

• carbohydrates

• nucleic acids

Which organic compound is crucial for building muscle cells and red blood cells, and is also used in many processes within the cell, such as creating enzymes and antibodies?

• Carbohydrates

• Lipids

• Proteins

• Nucleic Acids

Tags

NGSS.HS-LS1-1