An inversion refers to a type of mutation where chromosomal rearrangement takes place in a single chromosome. It can be of two types: Paracentric Inversion and Pericentric Inversion.
Pericentric inversion occurs in the chromosomes that leads to abnormal gametes where some genes are missing.
Abnormal gametes associated with a heterozygous pericentric inversion result from crossing over which is characterized by two-break events within the chromosome (short arm and the long arm).
Answer:
When an impulse reaches the muscle fibres of a motor unit, it stimulates a reaction in each sarcomere between the actin and myosin filaments. This reaction results in the start of a contraction and the sliding filament theory.
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Answer: A - Isobars
Explanation: Isobars represent patterns of pressure. They show how pressure is changing over space and can help describe the large scale weather patterns across a region in the map.
Answer:
represents the flow of water through its concentration gradient, through a semi-permeable membrane.
Explanation:
This means that water flows from where it is in a higher concentration to a place where it is in a lower concentration to try to equalize the concentrations of both solutions.
Osmosis is an example of diffusion when molecules tend to be evenly distributed in space.
Answer:
RER is involved in protein synthesis, folding, transport and modification.
Explanation:
The Endoplasmic Reticulum is an organnelle found in eukaryotic cells. They are of two types; Rough Endoplasmic Reticulum and Smooth Endoplasmic Reticulum, so named based on the appearance of their surface. The Rough Endoplasmic Reticulum (RER) obtains it rough appearance from the membrane bound ribosomes attached to it.
Due to the ribosomes that attach to them during protein synthesis, their function is very much associated with protein synthesis. They are primarily involved in protein production, which would either remain in their lumen for further modification/processing called Glycosylation (adding sugar to proteins to form glycoproteins) or be transported through secretory vesicles to the Golgi apparatus. They also fold this proteins in their inner membrane structure called cisternae.
