How is “lock and key” used to describe the action of enzymes? (1 point)

Responses

Enzymes are able to create gaps in cell walls that allow products to leave cells.
Enzymes are able to create gaps in cell walls that allow products to leave cells.

Enzymes have a shape that specifically fits the products, like a key in a lock.
Enzymes have a shape that specifically fits the products, like a key in a lock.

Enzymes have a shape that specifically fits the reactants, like a key in a lock.
Enzymes have a shape that specifically fits the reactants, like a key in a lock.

Enzymes are able to create gaps in cell walls that allow reactants to enter cells.

11 answers

The correct response is:

Enzymes have a shape that specifically fits the reactants, like a key in a lock.

This analogy describes how enzymes work by matching their active site shape to the specific shape of their substrates (reactants), facilitating the biochemical reaction.

You find a blog post written by a student on a university website about photosynthesis. It cites multiple peer-reviewed journals, and has several comments from other students who agree with the findings. Which is a reason to believe that the source is reliable?(1 point)
Responses

It may be reliable because other students verify the information in the blog.
It may be reliable because other students verify the information in the blog.

It may be reliable because the blog has been featured on a popular website.
It may be reliable because the blog has been featured on a popular website.

It may be reliable because they cited multiple peer-reviewed studies from scientific journals.
It may be reliable because they cited multiple peer-reviewed studies from scientific journals.

It may be reliable because they cited other student blogs.

The correct response is:

It may be reliable because they cited multiple peer-reviewed studies from scientific journals.

Citing peer-reviewed studies indicates that the information is grounded in scientific research, which adds to the reliability of the source.

Question
What are condensation and evaporation components of?(1 point)
Responses

the water cycle
the water cycle

photosynthesis
photosynthesis

transpiration
transpiration

the carbon cycle

The correct response is:

the water cycle

Condensation and evaporation are key processes in the water cycle, involving the transition of water between its liquid and vapor states.

Which of the following is related to water’s high specific heat capacity?(1 point)
Responses

It contributes to water's ability to dissolve ionic compounds.
It contributes to water's ability to dissolve ionic compounds.

It causes water to expand when it freezes.
It causes water to expand when it freezes.

It allows water to heat and cool more quickly than the surrounding land.
It allows water to heat and cool more quickly than the surrounding land.

It allows large bodies of water to moderate local climates.

The correct response is:

It allows large bodies of water to moderate local climates.

Water's high specific heat capacity means it can absorb and retain heat, which helps to stabilize temperatures in nearby areas, thus moderating local climates.

What is the movement of water, containing no solute, across semi-permeable cellular membranes through proteins called aquaporins known?(1 point)
Responses

endocytosis
endocytosis

active transport
active transport

osmosis
osmosis

simple diffusion

The correct response is:

osmosis

Osmosis is the movement of water across semi-permeable membranes, and aquaporins are specific protein channels that facilitate this process.

What is a distinguishing feature between smooth endoplasmic reticulum and rough endoplasmic reticulum?(1 point)
Responses

Rough endoplasmic reticulum has ribosomes attached to its surface.
Rough endoplasmic reticulum has ribosomes attached to its surface.

Rough endoplasmic reticulum has vacuoles attached to its surface.
Rough endoplasmic reticulum has vacuoles attached to its surface.

Smooth endoplasmic reticulum has lysosomes attached to its surface.
Smooth endoplasmic reticulum has lysosomes attached to its surface.

Smooth endoplasmic reticulum has mitochondria attached to its surface.

The correct response is:

Rough endoplasmic reticulum has ribosomes attached to its surface.

This is the distinguishing feature that differentiates rough endoplasmic reticulum (RER) from smooth endoplasmic reticulum (SER), which does not have ribosomes attached to its surface.