Unit 3 Practice HSA questions

Euglena and Paramecium are eukaryotes because they both a. have a nucleus b. have ribosomes c. reproduce by sexual reproduction d. reproduce by asexual reproduction

A. Have a nuclues

Which cell structure contains molecules that direct cell activities? A. Nucleus B. Ribosome C. Mitochondrion D. Chloroplast

A. The Nucleus

The exchange of oxygen and carbon dioxide between the body and the air occurs in the lungs. This exchange of gases takes place at the cellular level. What part of the cell is primarily responsible for this exchange? a. the cell membrane b. the nucleus c. the cell wall d. the ribosome

A. The cell membrane

Scientists discovered a toxin that affects the energy production within cells. It prevents an organelle from making usable energy within the cell. Which of the following organelles would be most affected? a. chloroplast b. mitochondria c. ribosomes d. cell membrane

b. mitochondria

Animal cells contain an organelle that helps release energy. A diagram of this organelle is shown below. Which function would the energy-releasing organelle most likely have in the animal cell? A. cellular control B. cellular respiration C. removal of wastes D. storage of nutrients

B. Cellular Respiration, cellular respiration releases energy

During a trip to the beach, Allen finds a colony of sea anemones on a rock (pictured to the left). These sea anemones are green and get their color from tiny single-celled algae that live in their tissues. The algae produce food for the anemones while the anemones provide a place for the algae to live. Which parts of the single-celled algae are responsible for capturing energy? A. nuclei B. chloroplasts C. mitochondria D. cytoplasm

B. Choloroplasts

Animal cells contain an organelle that helps release energy. What is the organelle described? A. chloroplast B. mitochondrion C. nucleus D. ribosome

B. Mitochondrion The mitochondria is the site of cellular respiration so it releases energy.

The bacteria that live in the bodies of the giant tubeworms and the giant white clams are classified as A. eukaryotes B. prokaryotes C. plants D. fungi

B. Prokaryotes

Animal cells cannot perform photosynthesis because they are lacking which organelle: a. nucleus b. cytoplasm c. chloroplast d. cell wall

C. Chloroplasts

Sea grasses grow on the ocean floor in shallow areas. Runoff from the land into the ocean can cause the waters to become cloudy. Cloudy water affects the sea grasses' ability to make their own food because there is not enough A. oxygen B. water C. light D. carbon

C. Light

If a plant cell contains more solutes than its surrounding environment, then... a. There will be no net movement of water b. The cell will burst c. Water will enter the cell d. Water will leave the cell

C. Water will enter the cell

Cell membranes surround every type of cell. They allow certain things to enter the cell and certain things to exit the cell. Since they do not let everything in/out, they are described as... a. Permeable b. Selectively-permeable c. Semi-permeable d. Both B & C

D. Both B & C

Scientists have found that the rate of division in amoebas is controlled. Scientists believe that the transition from stage 2 to stage 3 is slowed by proteins. The additional time seems to help the amoeba change coding errors caused during DNA replication. Specialized proteins control cell division in the amoeba. Which cell part is responsible for making these proteins? A mitochondrion B nucleus C pseudopod D ribosome

D. Ribosomes Ribosomes make protein.

A scientist analyzed the membrane of an animal cell she was viewing in the lab. She noticed many repeating units throughout the membrane. What type of molecule makes up the majority of the cell membrane? a. Carbohydrates b. Amino acids c. Lipids d. Proteins

c. Lipids

In order to occur in plants, photosynthesis needs: a. sunlight and water b. sunlight and carbon dioxide c. sunlight, soil and water d. sunlight, carbon dioxide and water

d. sunlight, carbon dioxide and water