303 Bio Study Guide
1
Animals utilize the metabolic pathway of gluconeogenesis only when energy stores are very low.
False
When an ion crosses the membrane and binds to a protein to accomplish this feat, it is using active transport and facilitated diffusion.
Adaptation is always beneficial to an individual, even if the environmental cause for the change is no longer present.
False
Many animals are capable of producing all the required fatty acids for catabolic pathways.
True
Vomiting is/are an example of positive feedback loop control.
Positive feedback loops maintain a variable within its set point range
False
When maintaining homeostasis, it is important to do all of the following EXCEPT
Detecting external conditions
Covalent bonds are strong because electrons are shared between two atoms.
True
How can environmental conditions such as salt concentration, temperature, and pH physically affect the enzyme itself?
All these factors can disrupt the weak bonds that hold the enzyme in its active conformation.
Steroid hormones use cholesterol as a precursor molecule.
Organisms that are closely related to each other will share some features with all other organisms and share some features only with organisms from this same group.
The scientist Knut Schmidt-Nielsen studied the adaptations of animals living in harsh or unusual conditions, such as the camel.
Feedback loops maintain the internal environment in an acceptable state, or homeostasis.
Factors that generate opposite effects on a pathway are termed antagonistic controls.
Two compartments are separated by a membrane that is permeable to water and urea. Compartment I contains 1 M NaCl. Compartment II contains 2 M urea. Which of the following is a correct statement of their relationship based on the initial conditions?
Compartment I is hypertonic to Compartment II.
Compartment I is isosmotic to Compartment II.
Animals utilize the metabolic pathway of gluconeogenesis only when energy stores are very low.
False
When an ion crosses the membrane and binds to a protein to accomplish this feat, it is using active transport and facilitated diffusion.
Adaptation is always beneficial to an individual, even if the environmental cause for the change is no longer present.
False
Many animals are capable of producing all the required fatty acids for catabolic pathways.
True
Vomiting is/are an example of positive feedback loop control.
Positive feedback loops maintain a variable within its set point range
False
When maintaining homeostasis, it is important to do all of the following EXCEPT
Detecting external conditions
Covalent bonds are strong because electrons are shared between two atoms.
True
How can environmental conditions such as salt concentration, temperature, and pH physically affect the enzyme itself?
All these factors can disrupt the weak bonds that hold the enzyme in its active conformation.
Steroid hormones use cholesterol as a precursor molecule.
Organisms that are closely related to each other will share some features with all other organisms and share some features only with organisms from this same group.
The scientist Knut Schmidt-Nielsen studied the adaptations of animals living in harsh or unusual conditions, such as the camel.
Feedback loops maintain the internal environment in an acceptable state, or homeostasis.
Factors that generate opposite effects on a pathway are termed antagonistic controls.
Two compartments are separated by a membrane that is permeable to water and urea. Compartment I contains 1 M NaCl. Compartment II contains 2 M urea. Which of the following is a correct statement of their relationship based on the initial conditions?
Compartment I is hypertonic to Compartment II.
Compartment I is isosmotic to Compartment II.