ATI TEAS 7 Science (Bio) Exam Readiness Q & S 2024.

ATI TEAS 7




Bio




EXAM READINESS
Q&S




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,1. Which organelle is primarily responsible for energy
production in the cell?
- A) Nucleus
- B) Mitochondrion
- C) Ribosome
- D) Golgi Apparatus

Correct Answer: B) Mitochondrion
- Rationale: The mitochondrion is known as the
powerhouse of the cell because it generates ATP through
oxidative phosphorylation.

2. Which phase of the cell cycle is characterized by DNA
replication?
- A) G1 Phase
- B) S Phase
- C) G2 Phase
- D) M Phase

Correct Answer: B) S Phase
- Rationale: The Synthesis (S) Phase is when DNA
replication occurs to prepare for cell division.

3. What is the primary function of the ribosomes in a cell?
- A) Lipid synthesis
- B) Protein synthesis
- C) DNA replication
- D) Carbohydrate storage

Correct Answer: B) Protein synthesis
- Rationale: Ribosomes are the cellular structures
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, responsible for translating mRNA into polypeptide chains,
forming proteins.

4. In which part of the human body are the islets of
Langerhans located?
- A) Liver
- B) Pancreas
- C) Spleen
- D) Kidney

Correct Answer: B) Pancreas
- Rationale: The islets of Langerhans are clusters of cells
in the pancreas involved in the regulation of blood sugar
through hormone production (insulin and glucagon).

5. Which type of RNA is responsible for bringing amino
acids to the ribosome during protein synthesis?
- A) mRNA
- B) tRNA
- C) rRNA
- D) siRNA

Correct Answer: B) tRNA
- Rationale: Transfer RNA (tRNA) transports specific
amino acids to the ribosome as dictated by the sequence of
mRNA.

### Multiple-Select Questions:

6. Which of the following components are parts of the
endomembrane system in eukaryotic cells? (Select all that
apply)
- A) Endoplasmic reticulum
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