Answer:
b.Movement of phospholipids in the plasma membrane from one monolayer to the other requires the polar or charged head groupd to enter the hydrophobic interior of the lipid bilayer. This process requires a large positive change in free-energy, thus making this type of movement unlikely without an input of energy
The plasma membrane serves a protective function for the cell and is a selective membrane for particles entry
Answer:
Both DNA and RNA
According to transcription we have DNA that will form MRNA
Any characteristic, whether a physical trait, a behaviour, a physiological adaptation etc can make an organism more or less likely to survive in a particular environment.
<span>A dark colour could help a rabbit survive if it lives in a dark forest, because predators can't see it so well, but it would be less likely to survive in the arctic, where the environment is all white and it would show up. </span>
<span>In terms of the characteristics, think about: does it help the organism get food? Does it help protect the organism from predators? If it does, that organism is more likely to survive, and pass the characteristic on to it's offspring. If a bacterium has a characteristic of not being killed by antibiotics, this will help it to survive and breed.</span>
The features that are common to all cells include;
- Cytoplasm
- Ribosomes
- Genetic material
- Plasma membrane
<h2>Further Explanation;</h2><h3>Cell </h3>
- A cell is the basic unit of living organisms. It is the fundamental unit of all living organisms. All tissues in living organisms are made of cells.
- There are two types of cells; prokaryotic cells and eukaryotic cells.
<h3>Prokaryotic cells </h3>
- These are cells found in prokaryotic organisms such as bacteria. These cells are characterized by having;
- No nucleus
- DNA or nuclear material in an unbound region called the nucleoid
- No membrane-bound organelles
- Cytoplasm bound by the plasma membrane
<h3>Eukaryotic cells </h3>
- These are types of cells that are found in higher organisms such as plants and animals.
- Eukaryotic cells are characterized by having;
- Cytoplasm
- Membrane-bound organelles such as golgi bodies, mitochondrion, etc
- DNA in a nucleus that is bound by a nuclear membrane.
<h3>Similarities between prokaryotic and eukaryotic cells </h3>
All cells share similar features which include;
- Presence of a plasma membrane
- A cytoplasm that is bound by a plasma membrane
- Genetic material, that is, chromosomes containing genes
- Ribosomes that are responsible for making proteins
Keywords: cells, prokaryotic cells, eukaryotic cells
<h3>Learn more about:</h3>
Level: High school
Subject: Biology
Topic: Cell
Sub-topic: Types of cells
