Which of the following are used to determine a person's DNA sequence?
A. Enzymes
B. Blood types
C. Genes
D. Hormones
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Genes are used in techniques like DNA sequencing to determine a person's DNA sequence. DNA sequencing involves determining the order of nucleotides (A, T, C, and G) in a DNA molecule. Genes are used to replicate and amplify DNA segments, allowing researchers to analyze the sequence of nucleotides present in a person's DNA
Therefore, the Correct Answer is C.
More Questions on TEAS 7 Practice Exam 4
Question 1:
Nitrogen gas is an extremely stable molecule because its structure contains which of the following?
A. lonic bonds
B. Triple covalent bonds
C. Resonance bonds
D. Hydrogen bonds
The Correct Answer is B.Triple covalent bonds. Nitrogen gas consists of two nitrogen atoms that share three pairs of electrons, forming a triple bond. This bond is very strong and requires a lot of energy to break. Ionic bonds, resonance bonds, and hydrogen bonds are weaker types of bonds that do not occur in nitrogen gas.
Question 2:
In the following data table of an experiment carried out at 4° C (39.2° F) over 4 hours, which of the following options represents the dependent variable?
|
Solution in bag |
Solution outside bag |
Bag mass change (g) |
|
water |
water
|
-0.2 |
|
20% sucrose
|
water
|
+2.4
|
|
40% sucrose
|
water
|
+4.3
|
|
60% sucrose
|
water
|
+5.8
|
A. Duration
B. Temperature
C. Sucrose concentrations
D. Bag mass change
The Correct Answer is D.The dependent variable is the variable that is measured or observed in an experiment. It is the variable that changes as a result of the independent variable, which is the variable that is manipulated or controlled by the experimenter. In this case, the dependent variable is the bag mass change, because it depends on the sucrose concentrations in the bag and outside the bag. The other variables, such as duration, temperature, and sucrose concentrations, are independent variables that are set by the experimenter.
Question 3:
Which of the following is the process in which an ovarian follicle matures and releases a reproductive egg?
A. Oogenesis
B. Ovulation
C. Menstruation
D. Fertilization
The Correct Answer is B.The process in which an ovarian follicle matures and releases a reproductive egg is called ovulation. Ovulation is one of the phases of the menstrual cycle, which also includes follicular phase, luteal phase and menstruation
Question 4:
Which of the following summarizes a change that takes place as a solid turns to a liquid?
A. Particles become less ordered.
B. Intermolecular forces between particles become stronger.
C. Particles move closer together.
D. Particles have a decrease in mobility.
The Correct Answer is A.When a solid turns into a liquid during the process of melting, the particles within the solid gain enough energy to overcome the attractive forces holding them in a fixed arrangement. As a result, the particles become less ordered and more mobile, transitioning from a rigid structure to a more fluid state.
Question 5:
Which of the following is a group that can be measured against the experimental group?
A. Manipulated
B. Responding
C. Variable
D. Control
The Correct Answer is D.The experimental group is the group that receives the treatment or intervention in a scientific study. To evaluate the effect of the treatment, the experimental group is compared to another group that does not receive the treatment. This group is called the control group. The control group serves as a baseline or reference point for the experimental group. The control group should be as similar as possible to the experimental group in all other aspects, except for the treatment
Question 6:
A myocardial infarction affects which of the following blood vessels of the heart?
A. Pulmonary
B. Aorta
C. Vena cava
D. Coronary
The Correct Answer is D.A myocardial infarction (MI), commonly known as a heart attack, occurs when the flow of blood to the heart is blocked. The blockage is usually due to a buildup of fat, cholesterol and other substances in the heart (coronary) arteries. The fatty, cholesterol-containing deposits are called plaques. The process of plaque buildup is called atherosclerosis. Sometimes, a plaque can rupture and form a clot that blocks blood flow. A lack of blood flow can damage or destroy part of the heart muscle.
Question 7:
Which of the following vessels carries oxygenated blood?
A. Pulmonary vein
B. Pulmonary artery
C. Superior vena cava
D. Inferior vena cava
The Correct Answer is A.The pulmonary vein is the only vessel in the list that carries oxygenated blood. The pulmonary artery carries deoxygenated blood from the heart to the lungs, where it gets oxygenated. The superior and inferior vena cava are large veins that carry deoxygenated blood from the upper and lower body, respectively, to the heart.
Question 8:
Which of the following is the atomic number of an atom that has 12 protons and 12 neutrons?
A. 24
B. 1
C. 12
D. 144
The Correct Answer is C.The atomic number of an atom is defined as the number of protons in its nucleus. Protons are positively charged particles that make up part of the atomic mass, along with neutrons, which have no charge. The number of neutrons can vary for atoms of the same element, resulting in different isotopes. However, the number of protons is always constant for a given element. Therefore, to find the atomic number of an atom that has 12 protons and 12 neutrons, we only need to look at the number of protons.
Question 9:
| #OF FILTERS | MASS (g) |
TERMINAL VELOCITY (m/s) |
|---|---|---|
| 1 | 1.01 | 1.74 |
| 2 | 1.99 | 2.48 |
| 3 | 3.02 | 3.04 |
| 4 | 4.0 | 3.50 |
| 5 | 5.01 | 3.80 |
A group of students perform an experiment to test terminal velocity, which is the greatest speed obtained by a falling object. The students dropped different numbers of coffee filters and measured the resulting terminal velocity. Which of the following conclusions is supported by the data in the following data table?
A. Terminal velocity is when the force of gravity is equal to air resistance.
B. Heavier objects take more time to reach terminal velocity.
C. The greater the number of filters, the smaller the terminal velocity
D. Heavier objects fall faster than lighter objects.
The Correct Answer is D.Terminal velocity is the maximum speed achieved by an object freely falling through a gas or liquid. At terminal velocity, the forces acting on the object are balanced so it is no longer accelerating. Terminal velocity is achieved when the force of gravity is equal to air resistance. From the data table you provided, we can see that as the mass of the coffee filters increases, so does the terminal velocity. This means that heavier objects fall faster than lighter objects. Therefore, conclusion D is supported by the data in the table.
Question 10:
Which of the following statements best describes the function of erythropoietin in the human body?
A. It aids in lowering oxygen levels in the blood.
B. It aids in raising levels of clotting factors in the blood.
C. It aids in raising hemoglobin levels in the blood.
D. It aids in lowering CO2 levels in the blood.
The Correct Answer is C.Erythropoietin is a hormone that is produced by the kidneys and stimulates the production of red blood cells in the bone marrow. Red blood cells contain hemoglobin, a protein that binds to oxygen and transports it to the tissues. Therefore, erythropoietin helps to maintain adequate oxygen levels in the blood and prevent anemia.