eabio

Which of the following is responsible for the cohesiveproperty of water?

• Hydrogen bonds between the oxygen atoms of two adjacent water molecules

• Covalent bonds between the hydrogen atoms of two adjacent water molecules

• Hydrogen bonds between the oxygen atom of one water molecule and a hydrogen atom of another water molecule

• Covalent bonds between the oxygen atom of one water molecule and a hydrogen atom of another water molecule

• Hydrogen bonds between water molecules and other types of molecules

Tags

NGSS.HS-ESS2-5

Scientists examined the folded structure of a purified protein resuspended in water and found that amino acids with nonpolar R groups were primarily buried in the middle of the protein, whereas amino acids with polar R groups were primarily on the surface of the protein. Which of the following best explains the location of the amino acids in the folded protein?

• Polar R groups on the surface of the protein can form ionic bonds with the charged ends of the water molecules.

• Polar R groups are too bulky to fit in the middle of the protein and are pushed toward the protein’s surface.

• Nonpolar R groups that cannot form hydrogen bonds with water are pushed into the middle of the protein.

• Nonpolar R groups from different parts of the protein form covalent bonds with each other to maintain the protein’s structure.

Which structure in the provided diagrams represents a dipeptide that will end up forming a tripeptide?

• Structure A

• Structure B

• Structure C

• Structure D

Tags

NGSS.HS-LS1-6

Which of the following is NOT a function of the Golgi apparatus?

• Modifying proteins

• Packaging proteins

• Producing ATP

• Secreting materials

Which of the following is NOT a component of an amino acid?

• Carboxyl group

• Amino group

• Phosphate group

• R group

Which of the following best describes the function of the Golgi apparatus?

• Modifies, sorts, and packages proteins and lipids

• Synthesizes DNA

• Produces ribosomes

• Generates ATP

Which of the following best describes the condition expected after 24 hours? A dialysis-tubing bag filled with 3% starch and 3% glucose is placed in a beaker of distilled water.

• The bag will contain more water than it did in the original condition.

• The contents of the bag will have the same osmotic concentration as the surrounding solution.

• Water potential in the bag will be greater than water potential in the surrounding solution.

• Starch molecules will continue to pass through the bag.

• A glucose test on the solution in the bag will be negative.

Which event is unique to meiosis and does not occur in mitosis?

• Separation of sister chromatids

• Production of two daughter cells

• Crossing-over between homologous chromosomes

• DNA replication

What is the function of tumor-suppressor proteins?

• Promote cell division

• Suppress immune response

• Prevent uncontrolled cell growth

• Repair DNA mutations

Which of the following is NOT a result of mitosis?

• Production of two daughter cells

• Production of four daughter cells

• Maintenance of chromosome number

• Separation of sister chromatids

Tags

NGSS.HS-LS1-4