Biology Semester 1 Final Exam Review

A student constructs terrariums. Each terrarium has 2 plants and is exposed to a different amount of sunlight each day. In order to determine the ideal amount of sunlight, which of the following variables must be held constant by the investigator?

• type of plants

• wavelength of the light

• growth rate of plants

• amount of sunlight received

As part of an experiment to measure decomposition rates of different materials, student put food scraps from the cafeteria in compost bin A and placed it on the north side of the building for 5 weeks. Then the group took leaves and grass clippings in container B for six weeks and placed it on the east side of the building. Students in first period measured the temperature in bin A and students in sixth period measured the temperature in bin B. What is the greatest error in the student’s experimental design?

• There are too many variables

• Temperature is the only dependent variable in the experiment

• The materials chosen decompose too rapidly

• The students put equal masses of materials in each bin.

What is the dependent variable of the graph?

• Day Number

• Type of plant

• Height in cm

• Fertilizer used

If an experimenter is going to find the mass of salt in grams, which piece of equipment would be the best tool to use?

• meterstick

• graduated cylinder

• beaker

• triple beam balance

Proteins are to amino acids, just like carbohydrates are to _________.

• fats

• sugars

• nucleotides

• amino acids

Which of the following equations represents a balanced reaction?

B. 2 LiCl + 4 Br2 → 2 LiBr + Cl2

C. 2 Mn + 6 HI → 3H2 + 2 MnI3

D. 3 H2 + 4 O2 → 3 H2O

• 2AlBr3 + 3K → 3KBr + Al

• 2LiCl + 4Br2 → 2LiBr + Cl2

• 2Mn + 6HI → 3H2 + 2MnI3

• 3H2 + 4O2 → 3H2O

Without the presence of enzymes, predict what will happen to the chemical reaction.

• The reaction will speed up to produce the products more quickly

• The reaction will slow down to produce the products more slowly

• This will not have an effect on the reaction

NA stands for deoxyribonucleic acid. DNA has a double-helix structure and holds the genetic information for all living organisms. If one side of the helix has the sequence of AAC, predict the other side of the double helix.

• TTG

• AAG

• AAC

• TTC

Which property of water is most important for living organisms in a pond during the winter in Missouri?

• Water absorbs and retains heat

• Ice floats

• Water molecules stick together

• Water molecules stick to other polar substances

What are the three components of a nucleotide of DNA

• a nitrogenous base, a sulfur group and the sugar, deoxyribose

• a nitrogenous base, a sodium group and the sugar, deoxyribose

• a nitrogenous base, a phosphate group and the sugar, deoxyribose

• a nitrogenous base, a phosphate group and the sugar, ribose