ATI TEAS 7
ATI TEAS 7 Version 1 Science Questions
Extract:
Question 1 of 5
What is the function of a totipotent cell?
Correct Answer: B
Rationale: Totipotent cells possess the remarkable ability to differentiate into any cell type in the body, encompassing both embryonic and extraembryonic cell varieties. This quality is crucial in the early stages of embryonic development, facilitating the generation of all cell lineages and tissues. Unlike pluripotent or multipotent cells, totipotent cells exhibit the most extensive differentiation potential, playing a vital role in the organism's development from a single fertilized egg cell.
Extract:
Question 2 of 5
Which of the following macromolecules forms the cytoskeleton of a cell?
Correct Answer: A
Rationale: The correct answer is Proteins (Choice A). The cytoskeleton of a cell is primarily composed of proteins. Proteins such as actin, tubulin, and intermediate filaments form the structural framework of the cytoskeleton, providing support, shape, and aiding in cellular movement. Carbohydrates, nucleic acids, and lipids do not constitute the cytoskeleton; instead, they serve various functions within the cell. Therefore, understanding the composition of the cytoskeleton is crucial for comprehending cellular structure and function.
Question 3 of 5
What is the primary function of centrosomes in animal cells?
Correct Answer: D
Rationale: Centrosomes play a crucial role in animal cells by organizing microtubules. They act as the main microtubule organizing center (MTOC) and are essential for various cellular processes such as cell division, cell shape maintenance, and intracellular transport. Correctly organized microtubules are vital for maintaining cell structure and function, making option D, 'Microtubule organization,' the correct answer.
Question 4 of 5
What summarizes a change that occurs as solids transition into liquids?
Correct Answer: A
Rationale: The correct answer is A. When solids transition into liquids, particles become less ordered. In a solid state, particles are arranged in a fixed, orderly pattern due to strong intermolecular forces. As the solid transitions into a liquid, these forces weaken, allowing the particles more freedom of movement. Consequently, the particles become less ordered in a liquid compared to a solid, where they have more mobility and are not bound in a fixed structure.
Question 5 of 5
After infecting host cells, how does the AIDS virus, which contains RNA, insert viral DNA into the host T-cell?
Correct Answer: B
Rationale: Reverse transcriptase is an essential enzyme unique to retroviruses like the AIDS virus. It catalyzes the conversion of viral RNA into DNA through a process known as reverse transcription. The newly formed viral DNA is then integrated into the host cell's genome, enabling the virus to replicate and establish a persistent infection within the host.