HESI A2, V1 - BIOLOGY EXAM QUESTIONS

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HESI A2, V1 (2019)- BIOLOGY EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -43 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Lipids

Answer:

Better known as fats, but specifically they are fatty acids, phospholipids, and steroids.

Question 2: 4 steps needed for an experiment to be performed

Answer:

• Observation

• Hypothesis

• Experiment- gather data

• Conclusion

Question 3: Which organelle would you expect to be present in a cell responsible for detoxifying multiple molecules?

• Rough endoplasmic reticulum
• Smooth endoplasmic reticulum
• Lysosome

• Golgi apparatus

Answer:

• Smooth endoplasmic reticulum

Question 4: The two catabolic pathways that lead to cellular energy production are:

• Fermentation and protein synthesis
• Cellular respiration and glycolysis
• Fermentation and glycolysis
• Cellular respiration and fermentation

Answer:

• Cellular respiration and fermentation

Question 5: Endoplasmic Reticulum (ER)

Answer:

-Attached to the nuclear membrane - Rough ER - Smooth ER

Question 6: Eukaryotic Cell

Answer:

-Contain a membrane-enclosed nucleus -Contain a series of membrane-bound organelles (these carry out the functions of the cell as directed by the genetic information contained in the nucleus)

Question 7: Prokaryotic Cell

Answer:

-Lack a defined nucleus -Do NOT contain membrane-bound organelles

Question 8: The 4 most important molecules significant to biology

Answer:

Carbohydrates, lipids, proteins, and nucleic acids Question 9: Which of the following shows how information is transformed to make a protein?

• DNA-RNA-protein
• Gene-chromosome-protein
• ATP-amino acid-protein
• RNA-DNA-protein

Answer:

• DNA-RNA-protein

Question 10: Within the biologic hierarchic system of organization, which of the following is least inclusive?

• Phylum
• Order
• Kingdom
• Species

Answer:

• Species

Question 11: Metabolism

Answer:

the sum of all chemical reactions that occur in an organism.-These reactions take place in a series of steps called metabolic pathways , progressing from a standpoint of high energy to low energy.**All of the reactions are catalyzed by the use of enzymes

Question 12: Rough Endoplasmic Reticulum (RER)

Answer:

covered in ribosomes and it is responsible for protein synthesis and membrane production Question 13: A cell that does not contain membrane-bound organelles or a defined nucleus

would be classified as:

• Eukaryotic
• Embryonic
• Prokaryotic
• Symbiotic

Answer:

• Prokaryotic

Question 14: The sum of all chemical reactions that occur in an organism is:

• Product
• Respiration
• Metabolism
• Synthesis

Answer:

• Metabolism

Question 15: Cellular Membrane

Answer:

-Most important part of cell -Protection, communication, and the passage of substances into and out of the cell -Bilayer of phospholipids with proteins, cholesterol, and glycoproteins -Hydrophobic (hates water) region between the two layers because phospholipids are amphipathic molecules, making it slightly permeable.-Many of the proteins that pass completely through act as transport highways for molecular movement into and out of the cell.