Answer:
a. the DNA helix breaks or unzip down the middle between the base pairs.
b. the enzyme DNA polymerase moves along the exposed strand and add complementary nucleotide to each nucleotide in each existing strand.
c. a complementary strand is created for each of the two strands of the original double helix
d. two new identical DNA molecules have been produced.
Explanation:
The process of replication ensures the doubling of genetic material before cell division occurs in a cell. the process of repliction involves the above named four steps and is mediated by different enzymes performing different functions on this genetic material within the same close range (the replisome machinery). this enzymes include the helicases, the single strand binding proteins, the topoisomerases, DNA polymerases etc. the end product of replication is that two new identical DNA molecules will be produced from one.
Out of the written pairs, males have XY while females have XX
Answer:
Osmosis - water
Ions - diffusion
Large proteins - endocytosis
Explanation:
Ions and small molecules can cross the cell membrane by simple diffusion, where they move from a high concentration to a low concentration, down a concentration gradient.
Osmosis is the process whereby water travels across a semi-permeable membrane from a high concentration to a low concentration.
Larger cargo can cross the membrane through a process called endocytosis, where the membrane engulfs the particles and brings them inside the cell, encased in a vesicle.
Plants that encourage the profileration of nitrogen fixing bacteria are called Legumes