Waste (byproducts) made by the cell that serves no purpose to keep inside the cell membrane.
When talking about evolution, a good example is bacterial resistance to antibiotics.
We start with a bacteria colony, and in contact with antibiotics, most of them die.
Some of them in the colony do not die and took that antibiotic to create a mutation of its DNA to be resistance to that.
They evolved survive that antibiotic.
Answer:
a. Five-Carbon Sugar and Phosphate
Explanation:
A nucleotide can be defined as an organic molecule which forms the building block of nucleic acid such as deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Basically, nucleotide comprises of the following parts;
1. Nitrogenous base: this includes adenine (A), thymine (T), guanine (G), and cytosine (C) which are mainly found in the DNA while adenine (A), guanine (G), uracil (U) and cytosine (C) are found in the RNA.
2. A phosphate group.
3. A penrose sugar: it is either deoxyribose in DNA or ribose in RNA.
The two parts or chemical components of a nucleotide which do not change throughout the structure of DNA are;
I. Five-Carbon Sugar also known as deoxyribose and it has hydrogen on its second carbon.
II. Phosphate: this is the structural backbone that provides support to DNA.
Answer:
B) rough ER → Golgi complex → Golgi vesicle → extracellular fluid
Explanation:
- Insulin is synhtesized by beta cells of pancereas (preproinsulin).
- Insulin enters the rough endoplasmic reticulumn in its inactive form (proinsulin).
- The rough endoplasmic reticulumn converts it to active form (insulin).
- The rough endoplasmic reticulumn transfer the insulin to glogi comlpex
- The Golgi complex secrete it in golgi vesicles to cytoplasm.
- On the stimulation of beta cells insulin is secreted to extracellular fluid..
Um probably 4 because I got a little hungry