Biology EOC Pre-Test

How is a DNA molecule arranged?

• double-stranded with alternating deoxyribose and phosphate groups on the sides with adenine, guanine, cytosine, and thymine in the middle

• double-stranded with alternating deoxyribose and phosphate groups on the sides with adenine, guanine, cytosine, and uracil in the middle

• double-stranded with alternating ribose and phosphate groups on the sides with adenine, guanine, cytosine, and thymine in the middle

• double-stranded with alternating ribose and phosphate groups on the sides with adenine, guanine, cytosine, and uracil in the middle

A group of students completed two experiments. Their notes are below: Experiment 1: • Hydrogen peroxide was poured on a slice of raw potato. • The peroxide bubbled vigorously. • The peroxide was broken down into water and oxygen. Experiment 2: • A slice of raw potato was heated and then hydrogen peroxide was poured on it. • There was no visible reaction. Which statement explains the results of these experiments?

• A. Heating the potato had no effect on the potato enzymes.

• B. Heating the potato caused the hydrogen peroxide to evaporate, so the reaction did not occur.

• C. Heating the potato caused the potato enzymes to release the water and oxygen from the hydrogen peroxide.

• D. Heating the potato caused a shape change in the potato enzymes, so they could no longer function properly.

Hummingbirds thrive in warm, moist climates, and their primary source of food is nectar from flowering plants. A three-year drought is expected in an ecosystem. How will this most likely affect the hummingbird population in that ecosystem?

• The hummingbirds will increase their reproductive rate in order to ensure enough individuals survive.

• The hummingbirds will decrease their reproductive rate in order to decrease genetic diversity within the population.

• The hummingbirds will immediately adapt to eat new food sources, increasing the overall survival rate of the population.

• The hummingbirds will struggle to find food, and only those that can adapt to new food sources will survive.

Tags

NGSS.HS-LS2-6

NGSS.HS-LS4-5

This chart shows characteristics of four different cells observed under a microscope.

Which is most likely a prokaryotic cell?

• Cell 1

• Cell 2

• Cell 3

• Cell 4

Tags

NGSS.MS-LS1-1

What is the significance of three consecutive nucleotides in DNA?

• They code for one amino acid.

• They code for three amino acids.

• They code for one complete protein.

• They code for three complete proteins.

Tags

NGSS.HS-LS1-1

A cell experiences an error during the cell cycle, causing it to go through cytokinesis before mitosis. Which statement best describes the new cells?

• The new cells will be double the size of the original cell.

• The new cells will have twice as much DNA as the original cell.

• The new cells will have no DNA or organelles but will continue progressing through the cell cycle.

• The new cells will have an incorrect amount of DNA and organelles, and will likely experience cell death.

Tags

NGSS.HS-LS1-4

Among birds, some skin cells grow feathers when they mature, while other skin cells grow scales at maturity. Which statement best explains this difference?

• Skin cells exposed to colder environments grow feathers, while skin cells exposed to wet environments grow scales.

• While all cells have the same DNA, specialized cells express certain traits that produce feathers or scales.

• Skin cells that have feathers are diploid, while skin cells that make scales are haploid.

• Some skin cells have different DNA to build structures like feathers and scales.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

The table below describes several different types of energy transfer processes.

Energy Transfer in Organisms:

Which transfer represents photosynthesis?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Which substance must be present to release energy from glucose?

• hydrogen

• oxygen

• lactic acid

• carbon dioxide

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

Which is an example of the cycling of carbon?

• Animals use the carbon in carbon dioxide for cellular respiration.

• Graphene is formed by causing carbon atoms to align in a particular way.

• Carbon dioxide is trapped in the atmosphere and contributes to the greenhouse effect.

• A plant uses the carbon in carbon dioxide for photosynthesis and is eaten by an animal.

Tags

NGSS.HS-LS2-5