Teas Science

Question 1

What statement would be true concerning the following chemical equation knowing that the molecular mass of Zn = 65 amu, H= 1 amu, Cl = 35 amu?

Answer 1

65g of Zn and 72 g of HCl will produce 135g of ZnCl2 and 2 g of H2

Question 2

Carbon has 4 valence electrons, and Cl has 7 valence electrons. These atoms can form the compound CCl4. What would be true?

Answer 2

Each of the chlorine atoms will form a covalent bond with carbon resulting in a total of 8 electrons in carbons outermost energy shell

Question 3

What are the values of A and B in the equation below to show a properly balanced equation?
C5H12 + A O2 —> B CO2 + 6H2O

Answer 3

A = 8, B = 5

Question 4

What bond is responsible for the high surface tension of water?

Answer 4

Hydrogen bonds between water molecules

Question 5

For the reaction, PCl3 + Cl2 equilibrium PCl5 + heat, the rate of the reverse reaction will be favored under which of the following condition?

Answer 5

Increasing the temperature

Question 6

In pea plants, the allele for round seeds is dominant, and the allele for wrinkled seeds is recessive. What is the phenotype ratio if the F2 generation if the parental generation is a cross of a homozygous dominant round-seeded plant and a wrinkled-seeded plant?

Answer 6

75% round seeds: 25% wrinkled seeds

Question 7

What organism is bacterium that consist of spherical cells?

Answer 7

Staphylococcus

Question 8

You are comparing two unknown elements.
Element A has 7 valence electrons, and its outermost energy level contains electrons is energy level 2.
Element B has 2 valence electrons, and its outermost energy level contains electrons is energy level 5.
What would be true?

Answer 8

Element A has a higher electronegativity compared to Element B

Question 9

The density of ethyl alcohol is 0.789 g/ml what is the volume of 157.8 grams of ethyl alcohol?

Answer 9

200 ml

Question 10

What is the conjugate base of the acid HNO3?
HNO3 + H2O —> H3O+ + NO3-

Answer 10

NO3-

Question 11

Sucrose is formed by the bonding of the simple sugars glucose and fructose. What would be true?

Answer 11

Sucrose is a disaccharide that is formed by an anabolic reaction.

Question 12

Which of the following describes hydrocarbons?

Answer 12

The bonds between the carbons and hydrogens are nonpolar covalent which causes the hydrocarbons to be hydrophobic.

Question 13

Which of the following organelles is NOT involved in protein synthesis of a transmembrane protein?

Answer 13

Smooth endoplasmic reticulum

Question 14

Which of the following is NOT constructed from microtubules?

Answer 14

Lysosome

Question 15

The sodium potassium pump moves, both sodium and potassium against their concentration gradient across the cell membrane. What is the sodium potassium pump and example of?

Answer 15

Active transport

Question 16

The enzyme acetylcholinesterase breaks down acetylcholine. Sara is performing experiment in lap and accidentally heated her acetylcholinesterase to 90 degrees C. She adds the acetylcholinesterase to the acetylcholine and observes that the enzyme is unable to break down the acetylcholine, which of the following most likely occurred?

Answer 16

The active site of the acetylcholinesterase no longer has the correct shape to fit with the substrate.
The three dimensional structure of the acetylcholinesterase was denatured.

Question 17

Which of the following cells dissolves bone matrix during bone remodeling?

Answer 17

Osteoclast

Question 18

Which of the following joint types is the symphysis pubis an example of?

Answer 18

Cartilaginous

Question 19

During peristalsis, the muscular layers of the alimentary canal will involuntarily contract and relax to move materials through the tube. Which type of muscle is being descibed?

Answer 19

Smooth muscle

Question 20

Which of the following ions binds to troponin during a muscle contraction?

Answer 20

Calcium

Question 21

The somatic nervous system is classified as which of the following divisions of the nervous system?

Answer 21

Motor division; peripheral nervous system

Question 22

Which of the following is defined as a bundle of axons?

Answer 22

Nerve

Question 23

Which of the following structures in the eye contains the photoreceptors?

Answer 23

Retina

Question 24

Which of the following glands releases thyroid stimulating hormone?

Answer 24

Anterior pituitary

Question 25

A disruption in which of the following hormones could be the cause of the kidneys having issues retaining NA+?

Answer 25

Aldosterone

Question 26

A disruption in which of the following hormones could be the cause of kidneys having issues retaining Na+

Answer 26

Aldosterone

Question 27

Which of the following shows the correct sequence of structures that blood will pass through after blood leaves the right ventricle?

Answer 27

Pulmonary artery —> lungs —> pulmonary vein —> left atrium,

Question 28

If Janice has Type A positive blood, what type of blood can she receive?

Answer 28

O-, A-, and O+

Question 29

During the respiration process, what is defined as the diffusion of gases across the respiratory membrane?

Answer 29

Gas exchange

Question 30

Where does enzymatic protein digestion being?

Answer 30

Stomach

Question 31

Which of the following shows the correct path of urine in the urinary system? (NOTE: not all structures that urine passes through are listed!)

Answer 31

Nephron —> collecting dust —> renal pelvis —> ureter —> bladder —> urethra

Question 32

Which of the following occurs as carbon dioxide levels decrease in the blood?

Answer 32

The kidneys will compensate by retaining hydrogen ions as blood pH increases.

Question 33

Where will sperm travel to immediately after the seminiferous tubules?

Answer 33

Epididymis

Question 34

Which of the following structures produces progesterone after ovulation to maintain the endometrial lining?

Answer 34

Corpus luteum

Question 35

Which of the following is the appropriate unit for volume if a student needs to measure out one-hundredth of a milliliter?

Answer 35

Microliters

Question 36

Mike needs to measure out 10 grams of NaCl and add it to 93 ml of water. Which of the following procedures should he follow?

Answer 36

Mike should use an electronic balance to measure out 10 g of NaCl and use a graduated cylinder to measure out 93 ml of water. These should be mixed in a beaker.

Question 37

What unit would be most appropriate to measure the mass of a banana?

Answer 37

Grams

Question 38

A student preforms an experiment testing fertilizer types. She collects data and analyzes the data. What is the purpose of data analysis?

Answer 38

To draw a valid conclusion

Question 39

Abigail is a researcher at a food science company she is setting up an experiment to survey 100 participants about their taste preferences for five different soda flavors. Abigail will give each participant of flavor each soda flavor and have them right on a scale of 1 to 10, which of the following could be added to the experimental design to best strengthen the validity of her data and conclusions?

Answer 39

Set up a double-blind experiment

Question 40

Morgan has two of the same plant located in front of a window in her living room each day. She sprays a light mist of water on one plant sleeves, but not on the other after 30 days she knows that the plant that was sprayed lost fewer leaves which of the following hypotheses is she testing?

Answer 40

Spraying water on a plant’s leaves will decrease the number of leaves lost from the plant.

Question 41

A group of three kids is sledding down a hill on a snowy day, they have three different slides and observed that each sled will take them down different distances past the end of the hill. If they set up an experiment to test the distance each sled takes up what is the independent variable?

Answer 41

The type of sled