Teas Science Flashcards
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?
65g of Zn and 72 g of HCl will produce 135g of ZnCl2 and 2 g of H2
Carbon has 4 valence electrons, and Cl has 7 valence electrons. These atoms can form the compound CCl4. What would be true?
Each of the chlorine atoms will form a covalent bond with carbon resulting in a total of 8 electrons in carbons outermost energy shell
What are the values of A and B in the equation below to show a properly balanced equation?
C5H12 + A O2 —> B CO2 + 6H2O
A = 8, B = 5
What bond is responsible for the high surface tension of water?
Hydrogen bonds between water molecules
For the reaction, PCl3 + Cl2 equilibrium PCl5 + heat, the rate of the reverse reaction will be favored under which of the following condition?
Increasing the temperature
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?
75% round seeds: 25% wrinkled seeds
What organism is bacterium that consist of spherical cells?
Staphylococcus
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?
Element A has a higher electronegativity compared to Element B
The density of ethyl alcohol is 0.789 g/ml what is the volume of 157.8 grams of ethyl alcohol?
200 ml
What is the conjugate base of the acid HNO3?
HNO3 + H2O —> H3O+ + NO3-
NO3-
Sucrose is formed by the bonding of the simple sugars glucose and fructose. What would be true?
Sucrose is a disaccharide that is formed by an anabolic reaction.
Which of the following describes hydrocarbons?
The bonds between the carbons and hydrogens are nonpolar covalent which causes the hydrocarbons to be hydrophobic.
Which of the following organelles is NOT involved in protein synthesis of a transmembrane protein?
Smooth endoplasmic reticulum
Which of the following is NOT constructed from microtubules?
Lysosome
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?
Active transport
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?
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.
Which of the following cells dissolves bone matrix during bone remodeling?
Osteoclast
Which of the following joint types is the symphysis pubis an example of?
Cartilaginous
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?
Smooth muscle
Which of the following ions binds to troponin during a muscle contraction?
Calcium
The somatic nervous system is classified as which of the following divisions of the nervous system?
Motor division; peripheral nervous system
Which of the following is defined as a bundle of axons?
Nerve
Which of the following structures in the eye contains the photoreceptors?
Retina
Which of the following glands releases thyroid stimulating hormone?
Anterior pituitary
A disruption in which of the following hormones could be the cause of the kidneys having issues retaining NA+?
Aldosterone
A disruption in which of the following hormones could be the cause of kidneys having issues retaining Na+
Aldosterone
Which of the following shows the correct sequence of structures that blood will pass through after blood leaves the right ventricle?
Pulmonary artery —> lungs —> pulmonary vein —> left atrium,
If Janice has Type A positive blood, what type of blood can she receive?
O-, A-, and O+
During the respiration process, what is defined as the diffusion of gases across the respiratory membrane?
Gas exchange
Where does enzymatic protein digestion being?
Stomach
Which of the following shows the correct path of urine in the urinary system? (NOTE: not all structures that urine passes through are listed!)
Nephron —> collecting dust —> renal pelvis —> ureter —> bladder —> urethra
Which of the following occurs as carbon dioxide levels decrease in the blood?
The kidneys will compensate by retaining hydrogen ions as blood pH increases.
Where will sperm travel to immediately after the seminiferous tubules?
Epididymis
Which of the following structures produces progesterone after ovulation to maintain the endometrial lining?
Corpus luteum
Which of the following is the appropriate unit for volume if a student needs to measure out one-hundredth of a milliliter?
Microliters
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?
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.
What unit would be most appropriate to measure the mass of a banana?
Grams
A student preforms an experiment testing fertilizer types. She collects data and analyzes the data. What is the purpose of data analysis?
To draw a valid conclusion
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?
Set up a double-blind experiment
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?
Spraying water on a plant’s leaves will decrease the number of leaves lost from the plant.
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?
The type of sled
