Economics Homework Help

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Question 1

I f tyrosine and isoleucine undergo condensation, where does the new bond form?

-Between carbon of the carbonyl group and the nitrogen of the amino group

-Between carbon of the R group and the nitrogen of the amino group

-Between carbon of the carbonyl group anda the hydrogen of the R group

-Between oxygen of the R group and the hydrogen of the amino group -Betweeen carbon of the caboxyl group and the hydrogen of the amino group

2- What are the hereditary information

-Genes

-proteins

-hormones

-nucleotides

-RNA

3-In the experimental evaluation of a new drug, what is the purpose of a placebo

-A placebo prevents sampling errors from compromising the results of the experiment

-A placebo removes the potencfial psychological bias of the patient int he study

-A placebo increases the sample size

-A placebo prevents errors in recording of the data

-A placebo removes the bias of the physician in charge of the experiment

4-the cellular composition of life II . the evolution of life III .the interactions of living system IV . the machanisms of disease V . the transmission of information

A) II ,III , and IV

B) I , IV , V

C)III, IV , V

D) II , III ,V

E) I , II , III

5-Mitochondria play an imporatant role in cell necrosis

-True

-False

6-The the accompanying image is the product which type of microscope?

-Phase-contrast light microscope

-Nomarski differential Interference microscope

-Transmission electron microscope

-confocal fluorescense microscope

-Scanning electron microscope

7–Plants lack organ systems for disposing of toxic metabolic waste products. Their cells’ vacuoles are like what animal cell organelle?

(A) nucleolus

B lysosomes

c) chloroplasts

D) mitochondria

E) endoplasmic reticulum

8–Proteins made on ribosomes may be further modified within which organelle?

(A) peroxisomes.

(B) Golgi complex.

(c) mitochondria.

D) lysosomes.

(E) nucleus

9 One of the conclusions drawn from Darwin’s theory of evolution is that:

A) living organisms are composed of basic units called cells

(B) organisms living today descended with modifications from previously existing forms

C) existing organisms can adapt to environmental changes

D) living organisms contain substances produced by cells

E) genetic information can pass from organism to organism by means of DNA OOOO

10– In the accompanying figure, iconic bonds would form between the R groups if which amino acids?

-3 and 6

-2 and 4

-3 and 5

-1 and 3

-4 and 6

11-Identify three functions of proteins other than enzymes and briefly discuss or describe each.

——————————

12 Suppose a particular protein is produced in excess of the cell’s needs. What kind of mechanism will intervene to stop production? A) homeostatic

(B) anabolic

c) metabolic

D respiratory

E growth Question

13 Unlike lipids, hydrophilic functional groups typically contain atoms, which make them more soluble in water,

A- hydrogen

B- oxygen

c) carbon

D) nitrogen

E) phosphateQuestion

14 The cohesiveness between water molecules is due largely to:

A hydrogen bonds.

B) polar covalent bonds.

(c) hydrophobic interactions.

D nonpolar covalent bonds.

E) ionic bonds.

15– In a water molecule, because oxygen is more electronegative than hydrogen, the shared electrons are more commonly found around the nucleus than the nucleus.

A hydrogen; other hydrogen

B) oxygen; nitrogen

c) oxygen; hydrogen

D hydrogen; oxygen

(E) nitrogen; oxygen

16- The chemical behavior of an atom is determined most directly by the: A atomic weight.

B) number of neutrons.

c) number of valence electrons.

D) atomic number.

E) number of energy levels.

17- If you partially hydrogenate oleic acid, the resulting molecule most likely would:

A) lose a carboxyl group.

B) become soluble in water.

C) contain more double bonds.

D) have a double bond changed from cis to trans.

E) lose a carbon atom.

18– Isotopes differ from each other with respect to the number of:

(A protons only.

(B) electrons only.

C) neutrons only.

D) both protons and electrons.

E) both neutrons and protons.

19 If a toxin, such as a bacterial toxin, destroys ribosomes, what cellular activity will be affected first?

A) protein synthesis

B DNA synthesis

c) movement

D) active transport

E) energy storage

20– The ratio of the size of the image seen with the microscope to the actual size of the object is called:

A resolving power.

B magnification.

c) resolution.

D) fractionation.

E centrifugation.

21- If you observe a cell that contains organelles, then that cell is most likely a (n) prokaryote.

A) True

B) False

22 -The molecular mass of CH1206 is 180 amu. How much mass does 0.25 moles of this substance contain?

A 180 g

(B) 180 daltons

c) 45 daltons D)

1.8 g

E) 45 g

23 In the deductive approach to scientific thought processes, we begin with and make based on that Information

(A) premises; observation

B) observations; inductions

c) observations; conclusions

D premises; conclusions observations; premises m O O O O O O

24 Figure 4-4 In the accompanying figure, the formation of carbohydrates from carbon dioxide and water occurs in the portion of labeled: B B A D E E O O © ©

25 —The location and / or metabolism of a substance such as a hormone or drug can be followed in the body by labeling the substance with a (n): A) isotope

B radioisotope

C) element

(D) acid

E) DNA molecule

Question 26 It takes one calorie of heat to raise the temperature of one gram of water one degree Celsius at sea level. This is referred to as the of water.

A vaporization

B) heat of fusion

(c) homeostasis

D specific heat

E) heat of transformation