Mohamed Abbas, a science teacher at Senioritis.io

Mohamed Abbas
June 20, 2023
Earth Science

Petrified Wood: A Fascinating Example of Fossilization Through Permineralization and Its Use in Uncovering Earth’s Past.

And example petrified wood. If an organism is buried by wet sediment chemicals in the water can leech into the small spaces within the organisms tissue. Some...

Mohamed Abbas
June 20, 2023
Earth Science

Uncovering the Secrets of Molds and Casts: The Fascinating Formation of Fossil Imprints

Are buried organisms decay completely without becoming a mineralized leaving behind an empty space the empty space is called a mold, is in the shape of the...

Mohamed Abbas
June 20, 2023
Nutrition

Understanding the Impact of Nutrition and Health Beliefs on Food Choices: A Case Study

A 19-year-old boy avoids rice pudding because once when he was a child, he got sick after eating it. This practice of avoiding a certain food because...

Mohamed Abbas
June 20, 2023
Nutrition

Optimizing Caloric Intake: Analysis of Food Items A, B, C, and D to Meet Energy Requirements for Improved Health.

A patient is on a 2,000 kcal diet but is meeting only 80 percent of his total energy need. Which of the following food items could provide...

Mohamed Abbas
June 20, 2023
Chemistry

Optimizing Lysine and Arginine Separation through Ion Exchange Chromatography at pH 9.1-10.5

The pK1, pK2, and pKR of the amino acid lysine are 2.2, 9.1, and 10.5, respectively. The pK1, pK2, and pKR of the amino acid arginine are...

Mohamed Abbas
June 20, 2023
Chemistry

Understanding the Relationship between Alpha-Keto Acids and Amino Acids

Some amino acids are synthesized by replacing the keto group (C=O) of an organic known as an alpha-keto acid with an amino group (C-NH3+). The three letter...

Mohamed Abbas
June 20, 2023
Chemistry

Protein Conformational Change: How High Salt Concentration Modifies Sedimentation Rate

A protein has a sedimentation coefficient of 2.6S, when ultracentrifuged in a 0.1 M NaCl solution; the same protein has a sedimentation coefficient of 4.6S, when centrifuged...

Mohamed Abbas
June 20, 2023
Virology

Understanding Viral Replication: The Key Steps of Bacteriophages and Animal Viruses.

Which step is present in bacteriophage multiplication but not in multiplication of an animal virus?Multiple Choicea. New viral particles are released from the host cell by lysis.b....