Cells Unit Pre-assessment (Grade 8) Quiz

The body cells of most multicellular animals are not in direct contact with the external environment. These cells are supplied with materials from the environment by (Standard 1.2e):

• A central nervous system

• Hydrolytic enzymes

• Sense receptors

• A circulatory system

• Symbiotic bacteria

Structures found in a plant cell, but not an animal cell, include the following: (Standards 1.2 f, 5.1b)

• Chloroplasts, a cell wall, and a large vacuole

• Chloroplasts, a cell wall, and mitochondria

• Chloroplasts, centrioles, and Golgi apparatus

• Centrioles, a cell membrane, and a nucleus

• Centrioles, mitochondria, and a nucleus

The cell structure responsible for controlling which molecules enter and leave the cell and for the recognition of chemical signals is the: (Standard 1.2g)

• Cell wall

• Nucleus

• Mitochondria

• Chloroplast

• Cell membrane

Which statement best describes the function of a cell? (Standard 1.2h)

• Large organic food molecules like protein must be initially broken down. Once the broken down nutrient enters the cell, the cell will use the building blocks to synthesize organic compounds necessary for life.

• Large organic food molecules like protein directly enter the cell where they are used for energy.

• Large organic food molecules like protein are broken down only after they enter the cell. Once broken down, the cell will excrete the broken down substances.

• The cell makes its own protein and does not need nutrients from the outside environments.

• The function of the cell is to convert proteins to amino acids.

The organelle most directly involved in cellular aerobic respiration is the (Standard 1,2 i):

• Ribosome

• Mitochondrion

• Nucleus

• Lysosome

• Golgi apparatus

Which substances are secreted at the endings of nerve cells?  (Standard 1.2j)

• Antibodies

• Antigens

• Neurotransmitters

• Lipids

• Neurons

Which activity, illustrated in the diagram below, is being performed by the ameba (a single-celled protist)? (Standard 1.3a)

• Egestion

• Synthesis

• Circulation

• Ingestion

• Respiration

The production of energy-rich ATP molecules is the direct result of (Standard 5.1 e)

• Recycling light energy to be used in the process of photosynthesis

• Releasing the stored energy of organic compounds by the process of respiration

• Breaking down starch by the process of digestion

• Copying coded information during the process of protein synthesis

The diagram below represents some events that take place in a plant cell. The letters X, Y, and Z most likely represent (Standards 5.1a, 5.1b):

• Carbon Dioxide, Light, and Water

• Oxygen, Carbon Dioxide, and Nitrogen

• Glucose, Light, and Carbon Dioxide

• Nitrogen, Oxygen, and Water

• Light, Oxygen, and Methane

Hydrogen peroxide (H2O2) is a toxic by-product of cellular metabolism in aerobic organisms. The reaction below occurs within the cells to prevent the accumulation of hydrogen peroxide. In this reaction, catalase functions as an:

• Enzyme in the breakdown of hydrogen peroxide

• Enzyme in the synthesis of hydrogen peroxide

• Emulsifier in the digestion of hydrogen peroxide

• Indicator in the detection of hydrogen peroxide

• Inhibitor preventing the digestion of hydrogen peroxide

The movement of water from an area of higher concentration to an area of lower concentration is known as

• Diffusion

• Osmosis

• Active Transport

• Hydrolysis

• Phagocytosis

Rate, on a scale of 1 – 4, 1 being the lowest and 4 being the highest, how much do you already know about cells and cell processes?

Rate, on a scale of 1 – 4, 1 being the lowest and 4 being the highest, how interested are you in cells and cell processes?