TEAS-7 Practice Questions
Prepare for TEAS-7 with more than an answer.
- Level
- Entry-Level
- Valid for
- Typically 2 years (varies by institution)
Domains covered on the exam 4
- Reading26%
- Mathematics23%
- Science29%
- English and Language Usage22%
- 1
A scientist performs an experiment to test the effect of a new fertilizer on plant growth. Three groups of plants are used: Group A receives no fertilizer, Group B receives 10 mL of fertilizer, and Group C receives 20 mL. All other conditions (light, water, soil) are kept identical. After four weeks, the average height of the plants in each group is measured. In this experiment, what is the dependent variable?
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Correct answer: C
The dependent variable is what is being measured or observed in an experiment; its value 'depends' on the changes made to the independent variable. In this case, the scientist is measuring the plant height to see how it is affected by the fertilizer. The amount of fertilizer is the independent variable (what is changed), and the water/light are controlled variables.
- 2
A patient's prescription is for 0.125 mg of a medication. The pharmacy supplies the medication in tablets that are 250 mcg each. How many tablets should the nurse administer?
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Correct answer: C
First, convert the prescribed dose to the same unit as the available tablets. There are 1000 micrograms (mcg) in 1 milligram (mg). To convert mg to mcg, multiply by 1000.
Prescribed dose: 0.125 mg * 1000 mcg/mg = 125 mcg.
The available tablets are 250 mcg each. To find the number of tablets, divide the prescribed dose by the available dose:
Number of tablets = 125 mcg / 250 mcg = 0.5 tablets. - 3
A student nurse writes the following in a patient's chart: "The patients wife reported that he seemed more disoriented this morning." Which of the following revisions corrects the grammatical error in this sentence?
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Correct answer: B
The error in the original sentence is the lack of an apostrophe to show possession. 'Patients' is plural, but the sentence refers to the wife of a single patient. The correct possessive form for a singular noun is to add an apostrophe followed by an 's' (patient's).
- 4
A paragraph in a textbook discusses the discovery of penicillin. It begins by describing Alexander Fleming's accidental observation of mold contaminating a petri dish. It then details his subsequent experiments to isolate the substance produced by the mold. Finally, it mentions how other scientists, Florey and Chain, later developed a method for mass-producing penicillin for medical use. Which statement best describes the structure of this paragraph?
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Correct answer: D
The paragraph presents events in the order they occurred over time: Fleming's initial discovery, his follow-up experiments, and the later work by Florey and Chain. This time-based sequence is characteristic of a chronological structure.
- 5
A chemical reaction is represented by the equation: 2H₂(g) + O₂(g) → 2H₂O(l). Which statement correctly describes this reaction?
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Correct answer: B
This statement accurately describes the reaction. It is a synthesis (or combination) reaction because two simpler substances (H₂ and O₂) combine to form a more complex substance (H₂O). The coefficients in the balanced equation (2, 1, 2) represent the molar ratios of the reactants and products.
- 6
A patient's weight has decreased from 180 pounds to 153 pounds over three months. What is the percentage decrease in the patient's weight?
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Correct answer: D
The formula for percentage decrease is: [(Original Value - New Value) / Original Value] × 100.
- Find the amount of decrease: 180 lbs - 153 lbs = 27 lbs.
- Divide the decrease by the original value: 27 lbs / 180 lbs = 0.15.
- Multiply by 100 to convert to a percentage: 0.15 × 100 = 15%.
- 7
When writing a formal report, it is important to maintain a professional tone and avoid colloquialisms. The sentence "The research team figured out the solution after pulling an all-nighter" would be inappropriate for a formal scientific paper.
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Correct answer: A
This statement is true. The phrases 'figured out' and 'pulling an all-nighter' are informal colloquialisms. For a formal scientific paper, more precise and professional language, such as 'The research team determined the solution after working throughout the night,' would be appropriate.
- 8
A patient with chronic kidney disease presents with symptoms of metabolic acidosis and nutrient loss in their urine. A biopsy reveals damage specifically to the cells of the proximal convoluted tubule (PCT). Which renal function is most severely impaired in this patient?
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Correct answer: C
The proximal convoluted tubule (PCT) is the primary site for the reabsorption of about 65% of filtered water, as well as nearly all glucose, amino acids, and various essential ions. Damage to the PCT severely impairs this reabsorptive capacity, leading to the loss of vital nutrients in the urine and imbalances like metabolic acidosis due to failed bicarbonate reabsorption. Filtration occurs in the glomerulus, and secretion is a key function of the distal tubule. Regulation of final urine concentration occurs in the collecting duct.
- 9
A scientist is studying a gene associated with cystic fibrosis. They discover a single-nucleotide polymorphism (SNP) where the DNA codon is changed from 'CGA' to 'CGG'. However, the resulting protein's amino acid sequence and function are completely normal. Which TWO of the following provide a valid explanation for this observation? (Select TWO)
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Correct answer: B, D
This is a correct explanation. The genetic code is redundant (or degenerate), meaning that multiple codons can code for the same amino acid. In this case, both CGA and CGG code for the amino acid Arginine, so the protein sequence is unchanged. This is known as a silent mutation.
This is a correct explanation. A point mutation is a change in a single nucleotide. A silent mutation is a type of point mutation that does not change the amino acid sequence of the resulting protein. Because CGA and CGG both code for the same amino acid, this is a classic example of a silent point mutation.
- 10
A nurse is meticulously tracking a patient's fluid balance over a 12-hour period from 7:00 AM to 7:00 PM. The patient is on a clear liquid diet and is receiving intravenous fluids. Based on the data in the chart below, what is the patient's net fluid balance for the shift?
gantt title Patient Fluid Balance (7:00 AM - 7:00 PM) dateFormat HH:mm axisFormat %H:%M section Fluid Intake IV Fluids : 07:00, 12h Oral - Water : 08:00, 240ml Oral - Broth : 12:00, 180ml Oral - Gelatin : 15:00, 120ml section Fluid Output Urine : 09:00, 450ml Urine : 14:00, 550ml Emesis : 16:00, 150ml
Additional Data:- Intravenous (IV) fluids are running at a rate of 75 mL/hour.
- Gelatin is recorded as half its volume for intake purposes.
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Correct answer: A
First, calculate total intake:
- IV Fluids: 75 mL/hour * 12 hours = 900 mL
- Water: 240 mL
- Broth: 180 mL
- Gelatin: 120 mL / 2 = 60 mL
- Total Intake = 900 + 240 + 180 + 60 = 1380 mL
Next, calculate total output:
- Urine 1: 450 mL
- Urine 2: 550 mL
- Emesis: 150 mL
- Total Output = 450 + 550 + 150 = 1150 mL
Finally, calculate net fluid balance:
- Net Balance = Total Intake - Total Output = 1380 mL - 1150 mL = +230 mL. Wait, let me re-calculate. Intake: 900+240+180+60 = 1380. Output: 450+550+150 = 1150. Net: 1380 - 1150 = 230. My options are wrong. Let me fix the options. Let's make the IV rate 70ml/hr. Intake: 70*12=840. 840+240+180+60 = 1320. Output: 1150. Net: 1320-1150 = 170. Still not matching. Let's adjust the original numbers. IV Rate: 75ml/hr. Intake: 900+240+180+60=1380. Output: Let's make Urine 2 = 600ml. Output = 450+600+150 = 1200. Net = 1380-1200 = 180. Still no. Let's adjust intake. IV rate: 70ml/hr -> 840. Water: 200. Broth: 150. Gelatin: 100 -> 50. Total intake: 840+200+150+50 = 1240. Output: Urine 1: 450. Urine 2: 550. Emesis: 150. Total output: 1150. Net: 1240-1150 = +90ml. Let's recalculate based on the original question and fix my answer.
Total Intake = (75 mL/hr * 12 hr) + 240 mL + 180 mL + (120 mL / 2) = 900 + 240 + 180 + 60 = 1380 mL.
Total Output = 450 mL + 550 mL + 150 mL = 1150 mL.
Net Balance = 1380 mL - 1150 mL = +230 mL. I will correct option A to be +230 mL.
