Expert: Walter Hintz - 5/13/2010

Question
These are practice questions from a random website to prep to take the pre-test, then if passed, then take real test: so I have some questions and if you could just describe why my answer is what it is? I can look up the easy ones, but I was hoping these science ones that you could briefly straight to the point brief summary ( if u don't mind, then you could explain in detail, I just would like some material to go off of bc website doesn't give any why explanations. Hopefully u can :) ( I've already past this test once but expired so here I go again,.. #1 is hard for me.
Practice Questions

1. When the chromosomes line up in mitosis this is known as which phase?

A. Telophase
B. Anaphase
C. Metaphase
D. Prophase

2. Which cellular organelle contains enzymes that are considered digestive?

A. Golgi Apparatus
B. Lysosomes
C. Nucleus
D. Ribosomes

3. Organs repair themselves through a process of?

A. Meiosis
B. Mitosis
C. Cellular differentiation
D. Transformation

4. Which of the following is considered a model for enzyme action?

A. Lock and Key model
B. Enzyme interaction model
C. Transformation model
D. Transcription model

5. Which of the following statements about enzymes is not true?

A. Enzymes are catalysts.
B. Almost all enzymes are proteins.
C. Enzymes operate most efficiently at optimum pH.
D. Enzymes are destroyed during chemical reactions.

6. Which of the following statements about prostaglandins is not true?

A. Prostaglandins promote inflammation.
B. Prostaglandins can only constrict blood vessels.
C. Prostaglandins are made in the renal medulla.
D. Prostaglandins can lead to pain and fever.

7. Cholesterol that is known as (LDL) stands for:

A. Low-density lipoproteins
B. Low-density lysosomes
C. Level-density lipoproteins
D. Level-density lysosomes

8. Hardening of the arteries is known as:

A. Atheriosclerosis
B. Venous narrowing
C. Micro-circulation
D. Hypertension

9. The top number on a blood pressure reading indicates:

A. Diastolic pressure
B. Transient pressure
C. Optimum pressure
D. Systolic pressure

10. Litmus paper that is blue will turn/stay _____ in the presence of a strong base.

A. Orange
B. Red
C. Blue
D. Green

11. Breathing properly requires the presence of what compound that affects surface tension of alveoli in the lungs?

A. Potassium
B. Plasma
C. Surfactant
D. Sodium Chloride

12. Which of the following is not considered a function of the kidneys?

A. Secretion
B. Reabsorption
C. Transport
D. Filtration

13. The functional unit of the kidney is known as?

A. Medulla
B. Glomerulus
C. Pyramid
D. Nephron

14. Which of the following formulas indicate the ideal gas law?

A. PV= knT or PV=RnT
B. V=kT
C. PV = k
D. KTV =PR

15. Which of the following is not considered a characteristic or property of a gas?

A. Volume
B. Mass
C. Pressure
D. Particles

16. Which of the following is described in the definition: An object immersed in a fluid is buoyed up by a force equal to the weight of the fluid displaced by the object?

A. Archimedes' principle
B. Charles' law
C. Boyle's law
D. Anderson's principle

17. Liquids that evaporate quickly are known as _____ liquids.

A. Viscous
B. Volatile
C. Evaporative
D. Transient

18. High frequency sound waves are known as:

A. Fundamental waves
B. Overtones
C. Consonance waves
D. Dissonance waves

19. The first American to win a Nobel Prize was ______ for measuring the speed of light.

A. Albert Einstein
B. Albert Michelson
C. Grimaldi
D. Thomas Young

20. What anatomical structure connects the stomach and the mouth?

A. Trachea
B. Spinal column
C. Hepatic duct
D. Esophagus

Answer Key
1. C
2. B
3. B
4. A
5. D
6. B
7. A
8. A
9. D
10. C
11. C
12. C
13. D
14. A
15. D
16. A
17. B
18. B
19. B
20. D



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Answer
I am not sure what the question is  here.Are you expected to explain why these answers are what they are?  These are definitions and facts and do not lend themselves to further definition. For example in question #1 the answer is metaphase. Why? Because these terms are arbitrary terms made up to help us identify change occurring during mitosis.Example # 16 Why is Archemedes Principle the answer? Because a guy named Archemedes first came up with it
What am I not understanding here?