Biology Chapter: Organic Molecules Quiz

What represents an example of a density-dependent limiting factor?

Which component is most likely to increase transpiration in plants?

Salt (NaCl) dissolves in water primarily due to which property of water molecules?

In an experiment involving the placement of grapes in different solutions, what is the independent (manipulated) variable?

The conversion of nitrates to nitrogen in the nitrogen cycle is referred to as what?

Which organic compound is formed from a sugar, a phosphate group, and a nitrogen base?

What happens to the carbon dioxide levels in the atmosphere if decomposers are removed from the carbon cycle?

Which category of organic molecules is correctly paired with its function?

Based on the graph showing human population changes over 2,000 years, which statement is accurate?

For which type of organism is the quadrant sampling method most effective in determining population size?

What is the approximate carrying capacity in the field for rabbits based on the provided data?

What can be concluded about the statement 'Hypotheses can never be proven true'?

Which best explains the presence of nitrogen-fixing bacteria in legume root nodules?

Bacterial Colony and Carrying Capacity

A graph illustrating the maximum carrying capacity shows the upper limit of a population that an environment can sustain.

Organic Compounds

Nucleic acids are made from a sugar, phosphate group, and nitrogen base.

Functions of Organic Molecules

Proteins provide structural support in skin, hair, and nails.
Nucleic acids do not digest; their main role is to store genetic information.

Hypothesis Validation

Hypotheses cannot be proven true; they can only be supported by evidence.

Human Population Trends

Over the last 200 years, human population experienced exponential growth.

Carbon Cycle in Ecosystems

Removal of decomposers will likely increase atmospheric carbon dioxide levels.

Quadrant Sampling

Quadrant sampling is most effective for estimating the population size of plants, due to their stationary nature.

Nitrogen-Fixing Bacteria

Legumes possess nitrogen-fixing bacteria that convert nitrogen gas into usable nitrates for plants.

Carrying Capacity Example

Approximate carrying capacity for rabbits in a field can be estimated between 400 and 600 based on growth patterns.

Carbon Cycle Model Addition

To accurately represent deer obtaining carbon, add an arrow from producers (grass and trees) to the deer.

Density-Dependent Limiting Factors

Disease is an example of a density-dependent limiting factor, which affects population size more as density increases.

Transpiration and Environmental Factors

Increased sunlight typically boosts transpiration in plants due to heating and increased evaporation.

Salt Dissolving in Water

Salt dissolves in water because the polar areas of water molecules attract and separate sodium (Na) and chloride (Cl) ions.

Independent Variable in Experiments

The independent (manipulated) variable in the grape experiment is the type of water used (tap vs. salt water).

Nitrogen Conversion Process

Denitrification is the process converting nitrates back into nitrogen gas in the nitrogen cycle.

Test your knowledge on the key concepts from biology regarding organic compounds and the dynamics of bacterial colonies. This quiz covers topics such as the structure of nucleic acids, the functions of carbohydrates, and the carrying capacity of bacterial growth. Challenge yourself to see how well you understand the interactions and functions of these biological molecules.

We read all feedback carefully, but we do not reply to all submissions. If you have an issue requiring a response, please use the Help Center.