Answer:
B. C-G and A-T
Explanation:
The pairings are adenine and thymine and cytosine and guanine
Answer: Eye drops are effective when it placed into the eyes with care and proper instructions.
Eye drops should be placed in the lower conjunctival sac that starts at the inner side of the eye not the outer side called as canthus.
If the eye drops are dropeed on the cornea of the eyes and this causes discomfort and hence should be avoided.
It should not be placed on the opening of the lacrimal ducts otherwise it will avoid the systemic absorption.
Answer:
The events in chronological order are:
- Abrin is absorbed into the blood and enters the body's cells
- Abrin binds to ribosomes in the cytoplasm
- Abrin inactivates the 28S rRNA in the large subunit of the ribosome.
- Ribosomes are unable to add new amino acids to polypeptides
- Protein synthesis halts in many tissues
- Multiple organ systems fail
- Victim dies
Explanation:
Abrin is a toxic protein obtained from the seeds of Abrus precatorius, it is highly toxic, with an estimated human fatal dose of 0.1-1 microgram/kg, and causes death after accidental and intentional poisoning.
When ingested the abrin would enter the victim's body and travel through the blood and eventually enter a cell's cytoplasm (abrin is absorbed into the blood and enters the body's cells). Once there it would interact with the ribosomes and reacts with them on a molecular level (peptide bond catalytic enzyme) (abrin binds to ribosomes in the cytoplasm), which results in the ribosome exhibiting its toxic response to abrin (abrin inactivates the 28S rRNA in the large subunit of the ribosome). As a result of the ribosome reacting to abrin (ribosomes are unable to add new amino acids to polypeptides), protein synthesis within that cell is affected (protein synthesis halts in many tissues). Once multiple cells are affected by abrin the organ will exhibit its toxic response (multiple organ systems fail), and the victim would die.
The core of the adaptive success characterized by population explosion was the result of an increased food supply.
So, the correct option is (d).
- The main driver of adaptive success—the population explosion—was a rise in food availability. The main cereal grains domesticated during the early Holocene, namely wheat, barley, corn, and rice, account for two thirds of caloric intake.
- The availability of sufficient quantities and quality of food for human populations is known as food security. Global demand for food has increased as a result of the world's rapidly growing human population.
- The food supply chain is essential in ensuring that the food we eat gets to our lips without any problems. The world community needs this complex system to preserve the security, sustainability, and safety of food.
To learn more about food supply.
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Answer:
The formula is 2n - 2
Since n is 30
= 2(30) - 2
= 60 - 2
= 58
A mutant nullisomic version of this organism would have 58 chromosomes.
A diploid cell missing both copies of the same chromosome exhibits a nullisomic condition or a cell or individual with one chromosomal type missing. Humans having this condition will not live.
