EOC Warmup Review #1

How does an enzyme impact a reaction in the body?

• by increasing the amount of energy needed to stop the reaction

• by increasing the amount of reactants needed in the reaction

• by decreasing the amount of energy needed to start the reaction

• by decreasing the amount of products produced during the reaction

After running, a dog breathes rapidly through its mouth.  This requires energy and allows the dog to release hot air from its lungs to the environment.

How does this action help the dog maintain homeostasis?

• It helps the dog cool down and regain a normal internal body temperature.

• It helps the dog warm its surroundings and provide a comfortable external environment.

• It helps the dog to increase its oxygen intake.

• It helps the dog to increase its metabolism.

A student looks at cross sections of tissues from three parts of a plant.  The student counts 50 cells from each plant part and records if the cells have a defined or undefined nucleus in a table.

Which tissue sample is experiencing the highest amount of cellular division, and why?

• The cells in the stem; they have the highest number of cells with a defined nuclei.

• The cells in the stem; they have the lowest number of cells with an undefined nuclei.

• The cells in the root; they have the highest number of cells with an undefined nuclei.

• The cells in the leaf; they have equal number of cells with an undefined and defined nuclei.

The model shows the process to create a pigment protein needed for making blue flower petals.

Which statement explains the relationship between DNA and the pigment protein?

• The flower color gene stores both DNA and the pigment protein for the flower.

• The pigment protein found in the flower determines the DNA sequence.

• The DNA has the information needed to make the pigment protein for the flower.

• The amount of pigment protein in the flower can stop DNA production.

The diagram shows the two types of adipose cells, or fat cells; brown adipcyte and white adipcyte.

Which adipocyte is matched with a reasoning as to why it burns more calories in the body?

• Brown adipocyte; it contains more lipid droplets.

• White adipocyte; it contains a larger nucleus.

• White adipocyte; it contains a single lipid droplet.

• Brown adipocyte; it contains a larger number of mitochondria.

A portion of a DNA molecule is 20% adenine (A) and 30% cytosine (C).  What would the percentage of thymine (T) be in the complementary strand for this portion?

• 20%

• 30%

• 40%

• 60%

Gray whales are aquatic mammals that mate in the winter.  In the winter, the northern Artic Ocean that is their main feeding ground becomes colder, and food becomes scarce.  As a result, they migrate to the warm waters off the coast of Mexico for mating.

Which is likely an advantage of migration in gray whales?

• protection from larger fish

• survival of their offspring

• regulation of their body temperature

• cleaner water for their offspring

What is the smallest unit of genetic information that can be directly read to code for a trait?

• Chromosome

• DNA Template

• Gene

• Nucleotide

In an insect, the allele E produces long wings, and the allele e produces short wings; allele G results in red eyes and allele g results in black eyes.  During meiosis, crossing over takes place between the chromosomes, as shown.

Which argues how crossing over affects variation in offspring?

• Crossing over results in a new combination of alleles, which increases the chances of variation in the offspring.

• Crossing over results in the copying of parental alleles, which reduces variation in the offspring.

• Crossing over increases the number of alleles in the individual, which increases the chances of variation in the offspring.

• Crossing over decreases the number of alleles in the individual, which reduces variation in the offspring.

Which is true about the nature of the enzyme?

• The enzyme changes during the reaction.

• The enzyme has a specific site for binding with a product.

• The enzyme binds with the substrates resulting in a product.

• The enzyme can only bind one product at a time to create a substrate.