Answer:
Red Blood Cell
Explanation:
Red Blood Cells (RBCs) are round and without a nucleus. It has no nucleus so that it has more space to accommodate oxygen molecules and it helps in diffusion due to the biconcave shape, and that biconcave shape is present because there is no nucleus present in the RBC.
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Answer:
The correct answer will be option-A
Explanation:
The process of transcription form a transcript molecule called mRNA from a single strand of DNA called template strand or antisense strand.
The process of transcription is mediated by the RNA polymerase enzyme which adds the nucleotide base pairs in (A, U, G, or C) to 3' end of the strand thus synthesizing the strand in 5'–3' direction.
Since the direction of adding the nucleotide is to the 3' end, therefore the polarity of the template strand will be 3'–5' direction.
Thus, option-A is the correct answer.
What are the differences between plant and animal mitosis? The most observable difference is the way in which cytokinesis occurs. In plants a new cell wall is fashioned between the new daughter cells, while in animal cells the cell membrane constricts to pinch the parent cell into daughter cells.
Glutamate is considered the major excitatory neurotransmitter.
Mechanism of action:
The neurons use neurotransmitters to interact with one other and their target tissues during the synaptic transmission process (neurotransmission). Nerve endings synthesise neurotransmitters, which are then released from them into the synaptic cleft. From there, receptor proteins in the cellular membrane of the target tissue bind to neurotransmitters. As a result, the target tissue is stimulated, blocked, or otherwise functionally altered.
More than 40 neurotransmitters found in the human neurological system, acetylcholine, norepinephrine, dopamine, gamma-aminobutyric acid (GABA), glutamate, serotonin, and histamine are some of the most significant.
Major excitatory neurotransmitter are
- Acetylcholine and Glutamate (ACh)
- Histamine
- Dopamine (DA)
- Noradrenaline (NAd), also known as norepinephrine (NE),
- Adrenaline (Ad), also known as (Epi)
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Answer:
C. The DNA fragments travel at different speeds through the gel.