The cytoskeleton of a cell is comprised of which of the following macromolecules?

A. Carbohydrates

B. Nucleic acids

C. Proteins

D. Lipids

Answer Explanation:

The cytoskeleton of a cell is a complex network of filaments and tubules that provides structural support, shape, movement, and organization to the cell and its components.

The cytoskeleton is composed mainly of proteins, which are macromolecules made of amino acids linked by peptide bonds. The three main types of proteins that form the cytoskeleton are microtubules, microfilaments, and intermediate filaments. Each type has a different structure, function, and distribution within the cell.

Therefore, the Correct Answer is C.

Q #1: Lithium has an atomic number of 3 and a mass number of 7. Which of the following is the number of protons in a lithium atom?

A. 12

B. 3

C. 4

D. 7

Answer Explanation

The number of protons in an atom is equal to its atomic number. In this case, lithium has an atomic number of 3, so it contains 3 protons.

The other choices (A, C, and D) do not represent the correct number of protons for a lithium atom.
Q #2: To separate genomic DNA fragments by size, which of these laboratory methods is most useful?

A. Filtration

B. Spectrophotometry

C. Titration

D. Electrophoresis

Answer Explanation

One of the most common techniques for separating DNA fragments by size is electrophoresis. Electrophoresis is a process that uses an electric field to move charged molecules through a porous gel matrix. The gel acts as a sieve, allowing smaller molecules to move faster and farther than larger ones. By applying a dye to the DNA samples and loading them into wells at one end of the gel, the DNA fragments can be visualized as bands after electrophoresis. The distance of each band from the well indicates the size of the corresponding DNA fragment.
Q #3: Which of the following reasons explains why it is important for new scientific findings to be published?

A. Publishing findings will help scientists become more biased.

B. This prevents other scientists from performing similar tests.

C. Scientists will get paid if their findings are published.

D. Other scientists can validate or disprove the findings.

Answer Explanation

One of the essential aspects of scientific inquiry is the communication of results to peers and the public. Publishing new scientific findings allows other scientists to review, replicate, or challenge the methods and conclusions of a study. This way, science can advance by building on previous knowledge and correcting any errors or inconsistencies.

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The cytoskeleton of a cell is comprised of which of the following macromolecules?

More Questions on TEAS 7 Science

Q #1: Lithium has an atomic number of 3 and a mass number of 7. Which of the following is the number of protons in a lithium atom?

Answer Explanation

Q #2: To separate genomic DNA fragments by size, which of these laboratory methods is most useful?

Answer Explanation

Q #3: Which of the following reasons explains why it is important for new scientific findings to be published?

Answer Explanation

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