Metabolism of proteins Which of the following substances is excreted by sweat glands in response to the breakdown of proteins and the formation of ammonia?

A. Sebum

B. Urea

C. Lysozymes

D. Water

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Answer Explanation:

Proteins are nitrogen-based compounds, which when broken down release ammonia. Ammonia is a toxic substance to the body, and sebaceous glands coverts it to urea.

Therefore, the Correct Answer is B.

More Questions on Custom TEAS Science Practice Test 1

Question 1:

Practice Question

An atom has 14 protons and 20 neutrons. What is its atomic number?

A. 20

B. 17

C. 10

D. 14

The Correct Answer is D.

Question 2:

Which of the following vessels carries oxygenated blood?

A. Inferior vena cava

B. Pulmonary vein

C. Pulmonary artery

D. Superior vena cava

The Correct Answer is B.

Pulmonary vein carries oxygenated blood from the lungs to the heart. Pulmonary artery carries deoxygenated blood from the heart to the lungs.
Superior and inferior vena cava bring in deoxygenated blood from all other parts of the body to the heart.


Question 3:

In a plant in which fuzzy leaves (F) are dominant over smooth leaves (f), which of the following crosses will produce only offspring with smooth leaves?

A. Ff x ff

B. Ff x Ff

C. FF x FF

D. ff x ff

The Correct Answer is D.

Crossing is the breeding of parents to produce an offspring. Given that f is a recessive allele of smooth leaves while F is the dominant allele of fuzzy leaves. Therefore, where there is F crossing with f, the offspring will have fuzzy leaves over smooth one.
Therefore, for an offspring to have smooth leaves, ff and ff must cross to produce an offspring with smooth leaves.


Question 4:

Which of the following are structural features of the trachea?

A. C-shaped cartilage

B. Smooth muscle fibers

C. Cilia

D. All of the above

The Correct Answer is A.

Question 5:

The Life Cycle of HIV

Which of the following allows the AIDS virus, which contains RNA, to insert viral DNA into the DNA of a host T-cell after the AIDS virus enters the cell?

A. Receptor proteins located on the surface of the virus

B. The protein that makes up the capsid of the virus

C. Reverse transcriptase, an enzyme encoded by the virus

D. The phospholipids found on the envelope of the virus

The Correct Answer is C.

The AIDS virus (HIV virus) is Class VI or Group VI in the Baltimore Classification. Based on the Baltimore Classification, this specifically involves the reverse transcriptase enzyme and it is encoded by the virus.

This is the enzyme that will produce DNA molecules from the viral RNA. This is the mechanism involved where it will use the reverse transcriptase enzyme to insert viral DNA into the genetic material of the host cell.


Question 6:

Contraction of the external intercostal muscles causes which of the following to occur?

A. The diaphragm moves downward

B. The rib cage is compressed

C. The thoracic cavity volume decreases

D. The ribs and sternum move upward

The Correct Answer is D.

The intercostal muscles are muscles are located along the ribs. The intercostal muscles assist in respiration mechanically. This allows the expansion and contraction of the thorax.
Contraction of the external intercostal muscle causes the ribs and sternum move upward.


Question 7:

Which of Mendel's laws or principles states that gametes carry one allele for each trait?

A. law of segregation

B. independent assortment

C. gene segregation

D. phenotype assortment

The Correct Answer is A.

Question 8:

The ________ circulation picks up oxygen for cellular use and drops off carbon dioxide for removal from the body.

A. pulmonary

B. interlobular

C. respiratory

D. bronchial

The Correct Answer is A.

Our blood flow is separated into two major pathways, listed below:

  1. Systemic circulation - this comes from the left side of the heart and pumps blood to all working tissues, including the brain, muscle, heart, and other organs, and then into the right side of the heart.
  2. Pulmonary system - this comes from the right side of the heart, and pumps blood to the alveolar sacs within the lungs, and then into the left side of the heart

In pulmonary circulation: The pulmonary artery is a big artery that comes from the heart. It splits into two main branches, and brings blood from the heart to the lungs. At the lungs, the blood picks up oxygen and drops off carbon dioxide.


Question 9:

A myocardial infarction affects which of the following blood vessels of the heart?

A. Aorta

B. Vena cava

C. Pulmonary

D. Coronary

The Correct Answer is D.

A myocardial infarction refers to heart attack, which result from blockage of blood flowing into the heart.

Blocking is caused by the deposition of fat or cholesterol that forms plaque on the surface of coronary arteries, which supply blood to the heart.


Question 10:

Which of the following sequences on a DNA molecule would be complementary to GCTTATAT?

A. TAGGCGCG

B. ATCCGCGC

C. CGAATATA

D. TGCCTCTC

The Correct Answer is C.