Mock Review Part 3 Quizs

An organism extracts nutrients from another living organism without providing any benefit to the host. What type of ecological relationship is this?

• Commensalism

• Mutualism

• Parasitism

• Predation

The graph below shows enzyme activity at different temperatures. What happens to the enzyme when the temperature exceeds 57°C?

• The enzyme becomes more efficient.

• The enzyme stops working permanently because the shape of its active site changes.

• The enzyme works faster at higher temperatures.

• The enzyme is destroyed and cannot function again.

A scientist discovers an enzyme that only binds to a specific type of bacteria. Why does this enzyme only bind to that bacteria?

• The enzyme has an active site that matches the shape of the substrate on the bacterial surface.

• The enzyme randomly binds to any organism in the environment.

• The enzyme has no preference for any specific bacteria.

• The enzyme binds to all cells with the same efficiency.

Where is the genetic code located in a cell?

• Phosphate sugar backbone

• Lipids in the membrane

• Order of the nucleotides

• Enzymes in the nucleus

A molecular biologist is studying a gene responsible for producing a structural protein in human cells. Within the gene, she identifies a DNA codon that plays a crucial role in encoding an important amino acid. The original DNA sequence is 3’ - GCA - 5’.

If a mutation occurs in the DNA sequence, which of the following changes in the DNA codon would most likely alter the resulting protein?

• 3’ - GCG- 5’

• 3’ - GCT - 5’

• 3’ - TCT - 5’

• 3’ - GTT - 5’

Which of the following is an example of commensalism?

• A bird builds its nest in a tree without harming the tree.

• A tick feeds on the blood of a dog, causing harm to the dog.

• A bee pollinates a flower while collecting nectar.

• A wolf hunts and eats a deer in its habitat.

The following is a depiction of which type of transport

• Osmosis

• Facilitated DIffusion

• Passive Transport

• Active transport

• Endocytosis

In a population of birds, some individuals have small beaks that are efficient at eating soft seeds, while others have large beaks that can crack hard seeds. Birds with medium-sized beaks struggle to eat both types of seeds and have lower survival rates. Over time, the population consists mostly of birds with either small or large beaks, while those with medium-sized beaks become less common. The bold line is the original population while the dotted is after natural selection. This would be an example of

• Stabilizing selection
• Directional selection
• Sexual selection
• Disruptive selection

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-2

Which of the following is an example of parasitism?

• A mosquito feeds on human blood, transmitting disease.

• A remora fish attaches to a shark for transportation without harming it.

• A group of deer competes for food in the same habitat.

• Two bird species use the same tree for nesting without interacting.

How do vasoconstriction and vasodilation regulate blood pressure?

• They function randomly without any regulation.

• They switch after a set point is reached because blood pressure is controlled by a feedback mechanism.

• They only occur in response to external injuries.

• They happen continuously without responding to the body's needs.