Which of the following tools can be used to measure the turbidity of a liquid by measuring the transmission of light through the sample?

A. Spectrophotometer

B. Centrifuge

C. Electro photometer

D. Microdensitometer

Answer Explanation:

A spectrophotometer is an instrument that measures the intensity of light absorbed after it passes through a sample solution. With the spectrophotometer, the concentration of a chemical substance can be determined by measuring the intensity of light detected.

Therefore, the Correct Answer is A.

Q #1: Which of the following molecules contains the fewest covalent bonds?

A. Chlorine molecule

B. Ammonia molecule

C. Methane molecule

D. Water molecule

Answer Explanation

A chlorine molecule contains the fewest covalent bonds among the options provided. It consists of two chlorine atoms bonded together by a single covalent bond. Compared with the other options, ammonia has three covalent bonds, methane has 4 while water has 2.
Q #2: Which of the following types of cells stimulates other immune cells to attack and destroy foreign agents?

A. Cytotoxic T-cells

B. Plasma cells

C. Natural killer cells

D. Helper T-Cells

Answer Explanation

Helper T cells are important cells that stimulate the action of other immune cells. For instance, they not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells.
Q #3: Which of the following endocrine organs in the diagram below is involved in regulating milk production following childbirth?

A. Pituitary gland

B. Thyroid gland

C. Adrenal glands

D. Ovaries

Answer Explanation

The pituitary gland produces prolactin, which regulates milk production

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Which of the following tools can be used to measure the turbidity of a liquid by measuring the transmission of light through the sample?

More Questions on TEAS 7 Science

Q #1: Which of the following molecules contains the fewest covalent bonds?

Answer Explanation

Q #2: Which of the following types of cells stimulates other immune cells to attack and destroy foreign agents?

Answer Explanation

Q #3: Which of the following endocrine organs in the diagram below is involved in regulating milk production following childbirth?

Answer Explanation

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