Bio Final test 1

All the organisms in your campus make a

Community

Systems biology is mainly an attempt to

understand the behavior of biological systems by studying interactions among its parts

A controlled experiment is one that

tests experimental and control groups in parallel

What best demonstrates the unity among all organisms

structure and function of DNA

What best distinguishes hypotheses from theories in science

Hypotheses usuallly are relatively narrow and theories have broad explanatory power

What is an example of qualitative data

The fish swam in a sigzag motion

What best describes the logic of scientific inquiry

If my hypothesis is correct, I can expect certain test results

In the term trace element, the adjective trace means that

the element is needed in small amounts

Compared with 31P, the radioactive isotope 32P has

one more neuron

The reactivity of an atom arises from

The existence of unpaired electrons in the valence shell

What is true of all atoms that are anions

The atom has more electrons than protons

What correctly describes any chemical reaction that has reached equilibrium

The rates of the forward and reverse reactions are equal

What represents the 18O isotope of oxygen

8p+, 10n0, 8e-

The atomic number for sulfur is 16. Sulfur combines with hydrogen by covalent bonding to form a compound, hydrogen sulfide. Based on the number of valence electrons in a sulfur atom, predict the molecular formula of the compound

H2S

What coefficients must be placed in the blanks so that all atoms are accounted for in the products

C6H12O6 —> __ C2H60 + __ CO2

2;2

What is a hydrophobic material

Wax

We can be sure that a mole of table sugar and a mole of vitamin C are equal in their

Number of molecules

Measurements show that the pH of a particular lake is 4.0. What is the hydrogen ion concentration of the lake?

10-4 M

Measurements show that the pH of a particular lake is 4.0. What is the hydroxide ion concentration of the lake?

10-10 M

A slice of pizza has 500 kcal. If we could burn the pizza and use all the heat to warm a 50L container of cold water, what would be the approximate increase in the temperature of the water? (A liter of cold water weighs about 1 kg)

10 C

Organic chemistry is currently defined as

the study of carbon compounds

What functional group is not present in the molecule

sulfhydryl

What chemical group is most likely to be responsible for an organic molecule behaving as a base

amino

What hydrocarbon has a double bond in its carbon skeleton

C2H4

Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes>

The phosphodiester linkages of teh polynucleotide backbone would be broken

The molecular formula for glucose is C6H12O6. What would be the molecular formula for a polymer made by linking ten glucose molecules together by dehydration reactions?

C60H102O51

Which of the following pairs of base sequences could form a short stretch of a normal double helix of DNA

5’ ATGC 3’ with 5’ GCAT 3’