Science TEAS Version 7

Question 1 of 50

Science TEAS Version 7Which of the following body systems breaks down proteins into amino acids?

• Excretory
• Circulatory
• Endocrine
• Digestive

Question 2 of 50

If a portion of a strand of DNA bases reads 5′ AGCTAGCGT 3′, what would the sequence of bases on the complementary strand read?

• 5′ TCGUTCGCU 3′
• 3′ AGCTAGCGT 5′
• 3′ TCGATCGCA 5′
• 5′ UCGAUCGCA 3′

Question 3 of 50

Which of the following processes causes most of the carbon dioxide from the blood to move into the alveoli?

• Conversion to carbon monoxide
• Passive transport using carrier proteins
• Active transport using energy
• Diffusion down a concentration gradient

Question 4 of 50

Which of the following is the primary contributor to skin color?

• Eleidin
• Keratin
• Elastin
• Melanin

Question 5 of 50

Which of the following is the rhythmic contraction of smooth muscle that propels food through the esophagus?

• Anaphylaxis
• Peristalsis
• Sarcomere
• Chemotaxis

Question 6 of 50

Both digestion and absorption happen in which of the following parts of the digestive system?

• Esophagus
• Stomach
• Small Intestine
• Gallbladder

Question 7 of 50

Which of the following is the term used for a limb moving away from the torso along the frontal plane?

• Extension
• Adduction
• Abduction
• Flexion

Question 8 of 50

Rheumatoid arthritis is an autoimmune condition that involves which of the following physiological processes?

• Peristalsis
• InflammationScience TEAS Version 7
• Involution
• Metastasis

Question 9 of 50

Which of the following statements is an example of a positive feedback loop?

• Uterine contractions weaken, causing the release of less oxytocin.
• Uterine contractions strengthen, causing the release of more oxytocin.
• Uterine contractions weaken, causing the release of more oxytocin.
• Uterine contractions strengthen, causing the release of less oxytocin.

Question 10 of 50

Which of the following structures is present in both prokaryotic and eukaryotic cells?

• Golgi apparatus
• Chloroplast
• Endoplasmic reticulum
• Cell membrane

Question 11 of 50

The graph above shows a plot of DNA melting temperature (Tm) on the x-axis in degrees Celsius and the percent of GC in DNA on the y-axis. Which of the following is a logical conclusion based on the information in the graph?

• Melting temperature is independent of the amount of GC.
• If the DNA has a high percent AT, it will melt at a higher temperature.
• DNA with 60% AT content has the same melting temperature as DNA with 60% GC content.
• As the percent of GC content in DNA increases, its melting temperature increases.

Question 12 of 50

Which of the following statements best describes the role of enzymes in chemical reactions within living cells?

• Enzymes function as biological messenger molecules that carry substrates to cell receptors.
• Enzymes function as biological catalysts to increase the rate of chemical reactions in the biological pathways.
• Enzymes function as substrates and are broken down into multiple subunit components during the reactions.
• Enzymes function as products that are used to produce energy for additional reactions to occur during specific cell pathways.

Question 13 of 50

A scientist used different routes to administer a medication to a group of patients and then measured the plasma concentration of the medication over time. Previous data showed that the faster the plasma concentration increased, the faster the response the patient had to the medication.

Which of the following conclusions is supported by the data in the chart?

• The oral tablet would result in a faster response than the intramuscular administration.
• The intramuscular route of administration would have the fastest response.
• The sublingual route of administration would cause no response.
• The oral capsule would cause a faster response than the oral tablet.

Question 14 of 50

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

• Lysozymes
• Water
• Sebum
• Urea

Question 15 of 50

Which of the following terms describes the relaxation of the chambers of the heart during the cardiac cycle?

• Tachycardia
• Diastole
• Bradycardia
• Systole

Question 16 of 50

A researcher wants to design an experiment to determine if consuming electrolyte supplements during a marathon runner’s race performance improves their run time. Which of the following experimental designs would be best to test this?

• Comparing changes in run times between groups who consumed electrolyte supplements and those who did not
• Surveying runners after the race to see if they felt better after taking supplements
• Measuring the weight loss of runners who took supplements versus those who did not
• Tracking the heart rate of a single runner during the race while taking supplements

Question 18

Which of the following lengths is equal to 5 kilometers (km)?

• 500,000 millimeters (mm)
• 50,000 millimeters (mm)
• 500,000 centimeters (cm)
• 50,000 centimeters (cm)

Question 19

Parasitic worm infestation is hypothesized to be damaging to the host. However, scientists have recently discovered that worm infestation can relieve the effects of certain autoimmune disorders. In which of the following ways should the hypothesis be modified, given the new findings?Science TEAS Version 7

• Worm infestation reduces the severity of certain autoimmune disorders.
• Worm infestation prevents the body from immune malfunction.
• Lack of worm infestations is the cause of some autoimmune disorders.
• Worm infestations exacerbate the body’s immune reactions.

Question 20

Which of the following is the primary concern of a scientific study over the efficacy of a new medication if it is conducted by a private company that intends to market the medication?

• Bias on the conclusions of the study
• Use of control groups in the study
• Collection of excess data
• Empirical bases for the study

Question 21

Which of the following actions will most likely increase the rate at which a solid reactant dissolves in a liquid?

• Using a container with a smaller surface area
• Adding more liquid solvent
• Increasing the pressure above the solutionScience TEAS Version 7
• Breaking the solid into smaller pieces

Question 22

Which of the following body systems is the primary system involved in preventing an infection when a cut in the skin allows bacteria to enter the body?

• The immune system
• The endocrine system
• The circulatory system
• The excretory system

Question 23

How many times stronger is the hydrogen-ion concentration of a pH 4 solution as compared with a pH 9 solution?

• 5
• 100,000
• 50
• 0.000001

Question 24

Researchers studied two populations of light-colored moths exposed to different environments over several generations. Population A lived in a polluted area where tree bark was darker, while Population B lived in an area without pollution where tree bark was lighter. Over several generations, they observed moths in Population A became darker, while moths in Population B remained light-colored. Which of the following scientific explanations is best supported by the observations in the study?

• The change in moth coloration is an example of natural selection based on environmental factors.
• The moths in Population A experienced a genetic mutation due to pollution.
• The darker moths in Population A experienced lower predation rates than the moths in Population B.
• The environment had no effect on the coloration of the moths in either population.

Question 25

Which of the following explains the results of a Gram stain?

• Gram-negative bacteria contain a thick peptidoglycan layer and stain green.
• Gram-positive bacteria contain a thick peptidoglycan layer and stain purple.
• Gram-negative bacteria contain a thick glycocalyx layer and stain blue.
• Gram-positive bacteria contain a thick glycocalyx layer and stain red.

Question 26

Which of the following elements is most likely to gain electrons and form an anion based on its valence electron configuration?

• Magnesium (Mg) with an atomic number of 12
• Helium (He) with an atomic number of 2
• Sodium (Na) with an atomic number of 11
• Chlorine (Cl) with an atomic number of 17

Question 27

Which of the following processes includes the synthesis of a messenger RNA molecule from a DNA segment?

• Translation
• Transcription
• Replication
• Elongation

Question 28

Which of the following events occurs during the beginning of the follicular phase in the ovarian cycle?

• Follicle-stimulating hormones encourage the development of ovarian follicles.
• Luteinizing hormone secretion increases and triggers rupture of the mature follicle.
• The corpus luteum develops from the ruptured follicle.
• The endometrium thickens in preparation to receive a fertilized egg cell.

Question 29

Which of the following options describes the shape of the loop of Henle?

• Pleated sheet
• U-shaped
• S-shaped
• Coiled spring

Question 30

Which of the following best explains why the pressure exerted by carbon dioxide on the walls of a sealed container increases when dry ice (solid CO2) sublimates?

• CO2 particles exert less force on the container walls as a gas.
• CO2 molecules combine to form larger molecules in the gas phase.
• Gas CO2 particles occupy more space.
• Gas CO2 molecules move faster when CO2 is a solid.

Question 31

Which of the following diagrams highlights the pulmonary veins?

(Note: This question refers to the provided heart diagram options)

• Diagram highlighting the aorta
• Diagram highlighting the pulmonary trunk
• Diagram highlighting the four vessel openings entering the left atrium
• Diagram highlighting the interventricular septum

Question 32

Which of the following options describes a fluid-filled sac that reduces friction between a bone and a tendon?

• Articular cartilage
• Bursa
• Periosteum
• Extracapsular ligament

Question 33

Which of the following organelles modifies and packages proteins for secretion?

• Golgi apparatus
• Endoplasmic reticulum
• Extracellular matrix
• Nuclear envelope

Question 34

Which of the following options has the smallest surface area?

• Neuron
• Muscle cell
• Red blood cell
• Bacterial cell

Question 35

A student adds a solid solute to a liquid solvent until no more solid dissolves. The remaining solid settles at the bottom of the beaker. Which of the following terms best describes the system formed?

• A static equilibrium
• An osmotic equilibrium
• A thermal equilibrium
• A dynamic equilibrium

Question 35 of 50

The insulating sheath that facilitates rapid movement of the action potential down the axon is known as which of the following?

• Sarcomere
• Myelin
• Actin
• Myosin

Question 36 of 50

Which of the following is correct regarding the pH scale?

• A substance with a pH of 3 is 10 times more alkaline than a substance with a pH of 4.
• A substance with a pH of 3 is two times more acidic than a substance with a pH of 4.
• A substance with a pH of 3 is 10 times more acidic than a substance with a pH of 4.
• A substance with a pH of 3 is two times more alkaline than a substance with a pH of 4.

Question 37 of 50

Which of the following is the process in which an ovarian follicle matures and releases a reproductive egg?

• Oogenesis
• Ovulation
• Fertilization
• Menstruation

Question 38 of 50

Which of the following organs produces the hormone that stimulates the production of red blood cells known as erythropoietin?

• Heart
• Skin
• Kidney
• Spleen

Question 39 of 50

Which of the following processes involves the removal of a water molecule to form a covalent bond between monomers?

• HydrolysisScience TEAS Version 7
• Dehydration synthesis
• Oxidation
• Hydrogenation

Question 40 of 50

Which of the following describes one difference between skeletal muscles and cardiac muscles?

• Skeletal muscles are found in the viscera, whereas cardiac muscles are found in the cranium.
• Cardiac muscles contain intercalated discs, whereas skeletal muscles do not.
• Cardiac muscles are voluntary, whereas skeletal muscles are involuntary.
• Skeletal muscles are autorhythmic, whereas cardiac muscles are not.

Question 41 of 50

Which of the following actions describes the function of mRNA in protein synthesis?

• Links amino acids together during protein formation
• Transports genetic information from the genome to ribosomes
• Carries amino acids to ribosomes
• Forms the structural core of ribosomes

Question 42 of 50

Free ears in dogs are controlled by the dominant allele (F), and attached ears are controlled by the recessive allele (f). In addition, short hair in dogs is due to a dominant allele (S), and long hair is due to a recessive allele (s). Which of the following is the genotype of a dog with attached ears and short hair?

• FfSs
• ffSs
• ffss
• Ffss

Question 43 of 50

Which of the following are the sites within the human body where carbon dioxide and oxygen are exchanged?

• Synapses
• Arteries
• Venules
• Alveoli

Question 44 of 50

Which of the following is true of a mixture of water and NaCl?

• The oxygen atom of the water molecules is attracted to the sodium cations.
• NaCl is hydrophobic and will not dissolve in water.
• Hydration spheres form with sodium and chloride ions surrounding the water molecules.
• Water is the solute and NaCl is the solvent.

Question 45 of 50

Nucleotides that contain the sugar ribose are found in which of the following?

• GMP
• RNA
• DNA
• ATP

Question 46 of 50

The equation below shows the reaction that is catalyzed by the enzyme catalase in the liver.

2H2O2 —> 2H2O + O2 Hydrogen peroxide -> water + oxygen

If there is a sharp increase in the amount of hydrogen peroxide molecules in this reaction, which of the following would be the most effective way to achieve a faster yield of water and oxygen molecules?

• Add a competitive inhibitor.
• Perform the reaction in a closed container to prevent the products from escaping.
• Boil the catalase to denature it.
• Add more catalase.

Question 47 of 50

An investigation is conducted to determine if exposure to blue light before bedtime affects the sleep quality of teenagers. The investigation will measure the total sleep duration and the frequency of non-REM (deep) sleep. Which of the following is the most relevant hypothesis for this investigation?

• Blue light exposure before bedtime decreases the total deep sleep duration of teenagers.
• Blue light exposure leads to reduced caffeine consumption in teenagers.
• Teenagers experience vivid dreams after exposure to red light.
• Teenagers sleep better after exposure to red light before bedtime.

Question 48 of 50

Which of the following atoms is most likely to become a cation?

• Potassium, atomic number 19
• Fluorine, atomic number 9
• Oxygen, atomic number 8
• Helium, atomic number 2

Question 49 of 50

Stimulus: 1 of 1 A scientist collects the data from samples taken from the eggs of chickens that were fed different diets. Which of the following can be inferred from the data if the eggs are the same size?

[Table Data: Diet A = 6g Average Protein Content, Diet B = 9g Average Protein Content]

• Diet B contained higher amounts of fatty acids than Diet A.
• Diet A contained lower amounts of nucleotides than Diet B.
• Diet B contained higher amounts of amino acids than Diet A.
• Diet A contained lower amounts of monosaccharides than Diet B.

Question 50 of 50

Stimulus: 1 of 1 Which of the following is the most logical conclusion that can be made based on the data in the table?

[Table Data: Number of Bacterial Colonies Present at Various pH Levels. pH 4 = 0, pH 5 = 5-10, pH 6 = 44-55, pH 7 = 55-64, pH 8 = 69-79, pH 9 = 2-5, pH 10 = 0]

• Bacteria are not able to compete with other species in the environment at pH 4 and pH 10.Science TEAS Version 7
• Bacteria reproduce most quickly at pH 4 and pH 10.
• The environment at pH 4 and pH 10 is too acidic or basic for bacteria to live.
• There are more predators feeding on bacteria at pH 4 and pH 10.