Q1 & partial Q2 Review

A student groups different types of cells as shown.

• 1. Animal Cells 2. Plant Cells

• 1. Prokaryotic Cells 2. Eukaryotic Cells

• 1. Mobile Cells 2. Motile Cells

• 1. Fungal Cells 2. Bacterial Cells

When mammals get an infection, their internal body temperature often rises 2 to 3 degrees Celsius. The body gets the energy it needs to react to an infection by

• increasing the rate of cellular division

• decreasing the rate of glucose movement into the cell

• increasing the rate of cellular respiration in mitochondria

• decreasing the rate at which carbon dioxide is removed from the cell

Which molecule synthesized by plants is a major source of energy for cellular processes in both plants and animals?

• Wax

• Nucleic acid

• Glucose

• Chlorophyll

In the 1940s scientists performed an experiment that ultimately identified the site of protein synthesis. They also identified the molecule responsible for transporting information from the nucleus to the site of protein synthesis. What was this newly identified molecule?

• A gene

• mRNA

• ATP

• Thymine

The picture shows a contractile vacuole of a unicellular freshwater organism. The contractile vacuole regulates the flow of water into and out of the cell in an aquatic environment. What conditions cause the contractile vacuole to fill with water?

• The concentration of water is greater outside the cell than inside the cell

• The temperature of water in the vacuole is higher than the temperature of its

  environment.

• The concentration of water inside the cell is the same as the concentration outside the cell.

• The temperature of water in the vacuole is lower than the temperature of its environment.

This diagram shows cellular activity across a cell membrane. Which two processes does this diagram most directly model?

• Energy conversions and synthesis of new molecules

• Synthesis of new molecules and homeostasis

• Transport of molecules and energy conversions

• Homeostasis and transport of molecules

Which of these describes a difference between viruses and cells?

• Cells contain protein, and viruses contain only carbohydrates

• Viruses have flagella, and cells have only cilia.

• Cells reproduce independently, and viruses require a host to reproduce

• Viruses have membranes made of proteins, and cells have membranes made of nucleic acid.

Viruses can be transmitted through air, water, food, insect bites, and direct skin contact. Once a virus gains entry to the body, it invades a host cell in order to —

• deactivate the host cell’s defenses

• synthesize antibodies for defense

• metabolize host proteins and grow

• access the cells DNA for replication

An advertisement for a health supplement for dogs claims to build lean muscle and strengthen tendons and ligaments, as well as provide energy. Which two biomolecules must the supplement contain to provide these benefits?

• Carbohydrates and lipids

• Proteins and carbohydrates

• Nucleic acids and carbohydrates

• Lipids and nucleic acids

A biomolecule is shown. What is its main function?

• Fast energy

• Food Storage

• Genetic information

• Transporting molecules