Reference no: EM133297198

Questions

1. Carbohydrates are used mainly by the body for:

a. for lipid storage

b. as an energy source

c. for membrane construction

d. for building DNA

2. Which of the following is not a part of the DNA molecule?

a. ribose

c. cytosine

d. adenine

3. Choose the proper order for the following events leading from DNA to proteins

mRNA associates with a ribosome

transcription of DNA

elongation of protein chain

splicing of the mRNA

tRNA brings ami,no acid to ribosome

a. 2,4,1,5,3

c. 5,2,3,1,4

d. 2,1,3,5,4

4. The function of the RNA polymerase is:

a. bind to a promoter to initiate transcription

b. strings nucleotides together to form DNA

c. hook Okazaki fragments together during replication

d. act as the platform for protein synthesis

5. The function of a ribosome is to:

a. bind to a promoter to initiate transcription

b. act as the platform for protein synthesis

c. strings nucleotides together to form DNA

d. hook Okazaki fragments together during replication

6. The process that directly results in the synthesis of proteins:

a. translation

c. transcription

d. transformation

7. An incompletely dominant gene controls the color of chickens so the BB produces black, Bb produces a slate-gray color called blue, and bb produces splashed white. A second gene controls comb shape, with dominant gene R producing a rose comb and r producing a single comb. If a black chicken homozygous for rose comb is mated to a splashed white chicken with a single comb, what is the chance that their offspring will be black with a single comb?

b. 9/16

c. 0

d. 3/8

8. The sex of the fruit fly is determined as follows: XX is female while XY is male. The gene that results in the fly having a bar-shaped eye is recessive and located on the X chromosome. If a male with normal eyes is mated with a female who is heterozygous for the trait, what is the chance that the male offspring will have bar eyes?

a. 25%

b. 100%

c. 0%

9. In order to test the effects of acid rain on the development of tadpoles in a Central Wisconsin town, the DNR tested the pH of 2 ponds in the area (pH = 4.5 and 6) that were rather acidic. The scientists created an experiment in the lab of tanks simulating the ponds in the following design:

Tank A = pH 7 (normally seen in other ponds unaffected by acid rain)

Tank B= pH 6

Tank C = pH 4.5

They grew tadpoles in each tank and measured their growth rate for 4 weeks.

All the tadpoles were the same species and they were all fed the same amount and kind of food.

Which of the following is the independent variable of this experiment?

a. only pH 7 tank

b. the food that is fed to the tadpole

c. pH of the water

d. the growth rate of the tadpoles

10. All of the following are true regarding hypothesis EXCEPT:

a. hypothesis are falsifiable

b. hypothesis are narrow in scope compared to theories

c. hypothesis are educated guesses based on predictions

d. hypothesis and laws are interchangeable in use

11. Use the Hardy Weinberg equation for the following:

Red eyes in flies = R

white eyes in flies = r

red eyes are the dominant trait

you counted 100 flies and found 4/100 had white eyes.

How many flies had the genotype rr?

a. .4

b. .2

c. .8

d. .04

12. If based on the previous question (#26), the frequency of the white allele = .2 then what is the frequency of the red allele?

a. .04

b. .2

c. .4

d. .8

13. When red-flowered and white-flowered homozygotes are crossed in Four O'Clock plants, the resulting cross of the F1 generation is heterozygote with an intermediate pink flower phenotype. This is an example of:

a. incomplete dominance

b. epistasis

c. codominance

14. Which of the following best describes punctuated equilibrium as a reason for the rate of speciation?

a. small genetic changes accumulate over time to allow for phenotypic change and speciation

b. evolution occurs gradually over time

c. the rate of evolution is constant, with short time periods of no evolutionary changes

d. rapid evolutionary change are accompanied by long periods of equilibrium

15. Macroevolution refers to evolutionary changes that:

a. produce new species and groups of species

b. occur over long periods of time

c. cause changes in allele frequencies

16. If a collection of snakes that natively was originally light in color but a darker color emerged that allowed for that snake color to be less obvious to predators. The consequence was that the darker color had greater reproductive success and hence greater fitness.

What is this type of natural selection pattern called?

a. stabilizing selection

b. balancing selection

c. directional selection