The cell has to use active transport when it's trying to transport material against the concentration gradient. (from low to high concentration) Or, if a molecule is too big to diffuse through the cell membrane, it must be moved through using a carrier protein.
Hope that helped you.
Answer:
I think it's Helicase but im not quite sure
Explanation:
Answer: The molecules that make up the "rails" or sides of the DNA structure are deoxyribose and phosphate
Explanation: A DNA is a double stranded helix made up of nucleotides. A nucleotide is made up of three parts: a deoxyribose sugar, a phosphate group and a nitrogenous base. Nitrogenous bases found in DNA are Adenine, Thymine, Cytosine and Guanine. The bases pairs with each other to form the rungs of the ladder while the phosphate group and deoxyribose sugar forms the rail or the backbone. The rail containing phosphate groups and deoxyribose sugars is called the phosphodeoxyribose backbone.
Answer:
Mitochondria and chloroplasts have striking similarities to bacteria cells. They have their own DNA, which is separate from the DNA found in the nucleus of the cell. And both organelles use their DNA to produce many proteins and enzymes required for their function.
Explanation:
Answer: The question is incomplete therefore, the options are gotten from another websites.
demonstrating?
A. mechanical energy
B. potential energy
C. kinetic energy
D. two of the above
The correct option is C.
Kinetic energy.
Explanation:
It is kinetic energy because the chemical energy stores in food is converted to kinetic energy and this is because kinetic energy is the energy in motion.
When a person is running, the energy the person is using is kinetic energy because is the energy the person possess by virtue of his body in motion and it is the energy required to accelerate a body with mass from rest.