EmSAT Practice 3

The diagrams below represent the structures of certain biological macromolecules. Which of the following represent(s) the molecule(s) majorly responsible for contributing to the structure of enzymes?

• A

• B

• C

• A and C

The diagram below represents a plant cell. Which part is responsible for water storage and structural support?

• Q

• R

• S

• T

Helicobacter pylori is a strain of bacteria that can infect the stomach. Based on the graph below, which line most likely represents the growth of Helicobacter pylori?

• A

• B

• C

• None of the Above

Which of the following is correct about Krebs cycle?

• No energy carrying molecules are produced during this stage

• Not functioning in the absence of oxygen

• Occurs in the inner membrane of the mitochondria

• Produces the highest amount of energy among all stages of cellular respiration

Increasing temperature above the optimum for the enzyme results in loss of enzyme activity. How is this explained?

• Less frequent collisions between the enzyme and the substrate

• Reduced kinetic energy of the enzyme molecule

• Substrate molecules move faster, and effective collisions are less likely

• The shape of the active site is changed, and the substrate will no longer fit into it

Which letter in the diagram below represents the part of the alimentary canal that help in regulating glucose and maintaining homeostasis?

• A

• B

• C

• D

Which of the following statements is correct about the enzyme-substrate complex during an enzymatic chemical reaction?

• It cannot be affected by the presence of other molecules

• It dissociates once the reaction terminates

• It is permanent form of the enzymatic reaction

• It occurs independently of the enzyme’s active site

Which of the following properties of water prevents enzyme denaturation in the leaves of transpiring plants?

• High heat of evaporation

• High polarity

• Low melting temperature

• Strong covalent bonding

If parents both with blood type AB are expecting a child, what is the probability that the child will have blood type B?

• 0 percent

• 25 percent

• 75 percent

• 100 percent

A plant with red flowers is crossed with a plant that has white flowers. All resulting offspring have flowers showing both colors of red and white at the same time. What pattern of inheritance does the color of the flower petals follow?

• Codominance

• Incomplete dominance

• Independent assortment

• Simple dominance