Biology Exam 1 Review

Which of these is a component of a nucleotide?

• Protein

• Carboxyl Group

• Nitrogenous Base

• Lipid

Which statement is TRUE?

• Cells can move around using mitochondria.

• Smaller cells have a smaller ratio of surface area to volume.

• Cells can move around using flagella.

• Cells are large because larger cells are more efficient.

What kind of covalent bond does oxygen form with hydrogen?

• Ionic

• Polar

• Nonpolar

• Hydrogen

Because plants extract nutrients from the soil and use sunlight to generate glucose, they must be a _____?

• Consumer

• Producer

• Decomposer

• Reactor

Every morning, you notice that there are dead worms on the sidewalk. You start to think that maybe the worms come out at night and get stranded when the sun rises. What is this an example of?

• A Theory

• An Observation

• A Hypothesis

• A Conclusion

You add a slice of lemon to a cup of water. You know that lemon juice is acidic, so what just happened in your cup of water?

• The number of H+ ions went down, and the pH went up

• The number of H+ ions went up, and the pH went up

• The number of H+ ions went down, and the pH went down

• The number of H+ ions went up, and the pH went down

Michael was cooking breakfast and noticed the change in appearance of the eggs when he cooked them. This change is due to extreme heat affecting protein structure. What is this called?

• Renaturing

• Denaturing

• Dissolving

• Electronegativity

During a biology class, Lily and Harper were discussing mutations. Lily mentioned a change in DNA sequence that doesn’t affect the amino acid sequence. What is the highest level of folding structure that is affected?

• None

• Primary

• Secondary

• Tertiary

• Quaternary

A change in the DNA occurs, affecting a region of the encoded polypeptide that is supposed to interact with a DIFFERENT polypeptide. What is the highest level of folding structure that is affected?

• None

• Primary

• Secondary

• Tertiary

• Quaternary

Magnesium has an atomic mass of 24 and an atomic number of 12. How many neutrons does it have?

• 12

• 24

• 36

• 48

• The number of neutrons can't be determined from this information.