Answers MO-Biology ACharacteristics of Life

Cell Theory Answers

0 verified answers1 views

Free Preview

Which process connects glycolysis and the citric acid cycle?

lactic acid formation

acetyl CoA formation

electron transport

Krebs cycle

Free Preview

A scientist hypothesized that oxygen atoms from both carbon dioxide and water are used to make glucose during photosynthesis. However, experimental results using oxygen isotopes showed that all of the oxygen from the water ended up in the oxygen molecules that were produced. None of the oxygen from water was found in glucose. What should the scientist do to best gain scientific understanding of this topic?

Analyze the results, and change the experimental methods to retest the hypotheses in a different way.

Discard the faulty results that do not support the original hypothesis, and repeat the experiment using the same methods.

Analyze the procedural errors that took place in the experiment, and summarize these in a conclusion statement.

Repeat the experiment and adjust new data to support the original hypothesis.

Which statement correctly compares the body’s energy storage molecules?

Glycogen is the body’s main source of energy, but lipids contain most of the body’s stored energy.

Glycogen is the body’s main source of energy, but proteins contain most of the body’s stored energy.

Lipids are the body’s main source of energy, but glycogen contains most of the body’s stored energy.

Proteins are the body’s main source of energy, but lipids contain most of the body’s stored energy.

During which step of cellular respiration is the most ATP produced?

Krebs cycle

glycolysis

photosynthesis

electron transport chain

If a runner is doing vigorous exercise, which results from the anaerobic cellular process?

accumulation of lactic acid

accumulation of oxygen

depletion of ethanol

depletion of carbon dioxide

Consider this animal cell.Which organelles are labeled D, and what is one feature that distinguishes them from the other labeled organelles?

chloroplasts; the only organelles that produce sugars from sunlight

ribosomes; only found in animal and bacterial cells

centrioles; found in animal cells but not plant cells

mitochondria; the only energy-generating structures found in cells

Which statement best distinguishes an observation from an inference?

An inference is likely to change based on additional observations.

An observation is likely to change based on additional inferences.

An observation involves assumptions, but an inference does not.

An inference involves the senses, but an observation does not.

Suppose that a patient is diagnosed with a new disease caused by the buildup of waste material in the body’s cells. Which organelle is most likely malfunctioning in the patient’s cells?

Golgi apparatus

lysosome

ribosome

endoplasmic reticulum

During photosynthesis, the energy from sunlight is used to split water molecules. What happens to the hydrogen ions that are split from the water molecules?

They flow out of the thylakoid, providing energy to add a phosphate group to ADP.

They build up in the thylakoid, providing energy to break apart ATP molecules.

They build up in the thylakoid, where they bond to each other to create ATP.

They flow out of the thylakoid, where they stimulate enzymes to break apart ATP.

The table lists some organelles and functions. Only one pair is correctly matched.Functions of OrganellesOrganelleFunctionChloroplastStores water and waste materialsCell wallSupports cell membrane, maintains cell shape, and protects cellCell membraneBreaks down waste materials and debrisVacuoleProduces proteins for the cellWhich organelle in the table is correctly matched with its function?

chloroplast

cell wall

cell membrane

vacuole

During gym class, Raul walks briskly for a half hour. Jenna decides to sprint and run the bleachers for the same amount of time. Which statement best compares the cellular processes occurring in each student during this time?

Jenna’s cells are producing more lactic acid than Raul’s cells.

Raul’s cells are producing more lactic acid than Jenna’s cells.

Jenna’s cells are using more protein than Raul’s cells.

Raul’s cells are using more glycogen than Jenna’s cells.

Consider this animal cell.Which organelles are labeled G?

centrioles

lysosomes

ribosomes

mitochondria

Mira analyzed oxygen and carbon dioxide in inhaled and exhaled air. She found that the percentages of both gases were different in each. What other gas would most likely also have different amounts in inhaled and exhaled air?

ozone (O3)

hydrogen (H2)

water vapor (H2O)

sulfur dioxide (SO2)

An important difference between cellular respiration and photosynthesis is that when cellular respiration begins, glucose molecules are split. However, when photosynthesis begins

ADP molecules are split.

water molecules are split.

oxygen molecules are split.

carbon dioxide molecules are split.

The chemical reaction equation of photosynthesis is shown here:6CO2 + 6H2O C6H12O6 + 6O2What information is not given in this equation.

It does not show if the reaction is reversible

It does not show the reactants needed for the reaction

It does not show that photosynthesis consists of many separate steps.

It does not show the number of molecules required to produce glucose.

In what way are the light-dependent and light-independent reactions of photosynthesis similar?

Both require chemical energy to proceed.

Both occur in the chloroplast.

Both produce oxygen as a byproduct.

Both involve carbon fixation.

At which point is G3P removed from the Calvin cycle to be used in the production of carbohydrates?

during photophosphorylation

during carbon fixation

immediately after reduction

immediately after regeneration

To which substance does ferredoxin transfer an electron?

photosystem I

photosystem II

NADP+

NADPH

Which specific process in the light-dependent reactions produces oxygen and hydrogen ions?

the formation of NADPH

the production of ATP

the splitting of water

the excitation of electrons in photosytem I

Which statement correctly compares and contrasts the three stages of cellular respiration that occur in the presence of oxygen?

Each stage occurs in the mitochondria, but only the final stage produces ATP.

Each stage produces ATP, but only the third stage occurs in the mitochondria.

Each stage produces ATP, but only the first stage occurs in the cytoplasm.

Each stage occurs in the cytoplasm, but only the final stage produces ATP.

Did you find these answers helpful?

Cell Theory Answers

More from this Course

TRY EDGENUITY HACKS