<span>d. only the fittest of sperm and egg combinations will survive.
Others are external fertilization:
</span>a. all of the sperm will fertilize eggs.
b. sperm and egg will be released simultaneously.
c. the number of sperm and eggs produced will be equal.
<span>e. sperm will be protected until they can unite with the eggs.</span><span>
</span>
Answer:
<u>Attributes of E. coli articulation frameworks </u>
Advantages:
-
Quick articulation
-
Simplicity of culture
-
Significant returns
-
Cheap
-
Genome alterations conceivable
-
Large scale manufacturing quick and practical
Disadvantages:
- Proteins with disulfide bonds hard to communicate
- Produce unglycosylated proteins
- Proteins created with endotoxins
- Acetic acid derivation development bringing about cell lethality
- Proteins created as consideration bodies
- produce dormant proteins
- needs collapsing
<u>YEAST SYSTEM </u>
Advantages:
- Nearness of post translational change
- discharge can be recognized by emission signal
- develop in minimal effort media
- straightforward hereditary control
Disadvantages:
<u>Bacillus articulation frameworks </u>
Advantages:
- Solid discharge
- no association of intracellular consideration bodies
- Simplicity of control
- Hereditarily all around portrayed frameworks
- Exceptionally created change and quality substitution advancements.
- Unrivaled development qualities
- financially savvy recuperation
<u>Animal Cells:</u>
Advantage:
- nearness of post interpretation adjustment
Disadvatages
Issues with creature utilization
Can get sullied with creature diseases
Exorbitant downstream preparing
<u>Answer</u>:- Active transport
<u>Explanation</u>:-
There are two types of membrane transports
1. Passive transport - this type of transport occurs without the input of any energy and the molecules move along the concentration gradients that is from <em>high concetration to low concentration.</em>
2. Active transport- this type of transport takes place to move the molecules against the concentration gradient that is from <em>low concentration to high concentration.</em>
<em>The active transport is of two types:</em>
1. <em>Primary active transport-</em> in this type of transport <em>ATP</em> is used as an energy source to move the substances against the concentration gradient.
2.<em>Secondary active transport</em> - in this type of transport the gradient formed by the active transport is utilized and it involves the movement of 2 substances at a time aross the membrane. That is the movement of one molecule is coupled to another.
- The membrane proteins that are associated with active transport are called as <em>carrier proteins</em>. These proteins have a binding site for the molecules that they transport. Once they bind to the specific molecules, a conformation change is induced and this leads to the transport of the molecule across the membrane.
So, the <em>active transport is basically responsible for utilizing the energy from ATP and carrier proteins to move the substances across the membrane against their concentration gradient i.e. from low concentration to high concentration.</em>