Nucleotides contain sugar, a phosphate group, and a nitrogen base. Which of the following is a nitrogen base?(1 point)
Responses
guanine
guanine
ribose
ribose
tyrosine
tyrosine
deoxyribose
guanine
What are the chemical subunits that make up proteins?(1 point)
Responses
saccharides
saccharides
lipids
lipids
carbohydrates
carbohydrates
amino acids
amino acids
Identify the statement below that is true about chemical reactions.(1 point)
Responses
Endothermic reactions tend to increase the temperature of their surroundings.
Endothermic reactions tend to increase the temperature of their surroundings.
Exothermic reactions have products with more energy compared to the reactants.
Exothermic reactions have products with more energy compared to the reactants.
Exothermic reactions do not require activation energy in order to get started.
Exothermic reactions do not require activation energy in order to get started.
Exothermic reactions tend to release heat energy to the surrounding environment.
Exothermic reactions tend to release heat energy to the surrounding environment.
You find a blog post written by a student on a university website about photosynthesis. Assess the reliability of this source.(1 point)
Responses
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.
It may be reliable because they cited other student blogs.
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 they cited multiple peer-reviewed studies from scientific journals.
The movement of water, containing no solute, across semi-permeable cellular membranes through aquaporins is known as?(1 point)
Responses
endocytosis
endocytosis
osmosis
osmosis
simple diffusion
simple diffusion
active transport
osmosis
Distinguish between smooth endoplasmic reticulum and rough endoplasmic reticulum.(1 point)
Responses
Smooth endoplasmic reticulum has vacuoles attached to its surface.
Smooth endoplasmic reticulum has vacuoles attached to its surface.
Smooth endoplasmic reticulum has ribosomes attached to its surface.
Smooth 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.
Rough endoplasmic reticulum has ribosomes attached to its surface.