Y11 Ch1 and Ch2 Review

What are the primary roles of magnesium and nitrates in a plant?

• Magnesium is for making proteins, and nitrates are for making chlorophyll.
• Magnesium is for making chlorophyll, and nitrates are for making proteins.
• Magnesium is for respiration, and nitrates are for water transport.
• Magnesium is for structural support, and nitrates are for making glucose.

A scientist investigates how different quantities of magnesium affect the number of new leaves on a plant. Which of the following is the most suitable scientific hypothesis for this investigation?

• The scientist will count the number of new leaves on each plant.
• Plants require magnesium for healthy growth.
• Increasing the amount of magnesium given to a plant will increase the number of new leaves it produces.
• The plant's growth is affected by the amount of light it receives.

Which statement correctly describes a part of the carbon cycle?

• Plants remove carbon dioxide from the air during respiration.
• Photosynthesis is the process that returns carbon dioxide to the air.
• Decomposers get their carbon by breaking down dead plants and animals.
• The combustion of fossil fuels decreases the amount of carbon dioxide in the air.

What is the relationship between chloroplasts and chlorophyll in a plant cell?

• Chloroplasts are the green pigment, and chlorophyll is the organelle where photosynthesis occurs.
• Chloroplasts are organelles where photosynthesis happens, and chlorophyll is the green pigment inside them that absorbs light.
• Chlorophyll is a type of plant cell, and chloroplasts are the fluid that fills the cell.
• They are different names for the same part of the plant cell.

The process by which plants use light energy to convert carbon dioxide and water into glucose and oxygen is called:

• Respiration
• Photosynthesis
• Transpiration
• Decomposition

An increase in the concentration of carbon dioxide in the Earth's atmosphere is a major contributor to which environmental issue?

• A decrease in the Earth's average temperature.
• A reduction in sea levels.
• Global warming and rising sea levels.
• An increase in the amount of protective ozone in the stratosphere.

During the process of photosynthesis, an aquatic plant produces bubbles of gas. What is this gas?

• Carbon Dioxide
• Nitrogen
• Oxygen
• Methane

A student's data shows a plant produces the most bubbles of oxygen per minute under orange light compared to red, blue, or green light. What can be concluded from this?

• The plant photosynthesises most rapidly in orange light.
• The plant cannot photosynthesise in green light.
• The rate of photosynthesis is independent of light colour.
• The plant photosynthesises most rapidly in blue light.

What is the primary role of light in the process of photosynthesis?

• It provides the carbon atoms needed to make glucose.
• It serves as the source of energy for the chemical reaction.
• It provides the oxygen atoms needed to make glucose.
• It cools the plant's leaves to prevent overheating.

Of the first three elements in Group 1 of the Periodic Table (lithium, sodium, and potassium), which is the least reactive?

• Lithium
• Sodium
• Potassium
• They all have the same reactivity.