Biochemistry Questions and Answers
Question 33
I. Phosphoenolpyruvate
II. Carbamoyl phosphate
III. Glucose-6-phosphate
IV. 1,3-bisphosphoglycerate
Which of the following has a higher standard free hydrolysis energy than ATP?
a) I and III
B) I and IV
C) II and III
D) III and IV
E) I, II, IV
Question 34
Erythrocytes, the first carbon atom of which contains a radioactively labeled glucose molecule and obtained from venous blood, are incubated in an isotonic solution at physiological pH. At the end of the incubation period, these erythrocytes isolated
Read MoreGenetics: The Science of Heredity and Variation
Genetics: The branch of biology that deals with the study of genes, genetic variation, and heredity in organisms.
Heredity: The passing on of traits from parents to offspring through genetic information.
Phenotype: The observable physical or biochemical characteristics of an organism, influenced by both genetic makeup and environmental factors.
Genotype: The genetic makeup of an organism, referring to the specific combination of alleles present in its DNA.
Mutation: A change in the DNA sequence of an
Understanding Health, Diseases, and Healthy Living
Health and Its Determinants
Health is a state of equilibrium resulting from the combination of physical, mental, and social well-being. Health and illness are influenced by genetic, biological, environmental, and personal factors.
Causes of Aging
Aging is a complex process driven by:
- Errors in DNA replication and transcription, and unrepaired mutations.
- Cellular aging and death, leading to organ degeneration.
- Exhaustion of the neuroendocrine and immune systems.
- Formation of free radicals within cells.
Cancer
Read MoreSterilization Methods and Pyrogen Testing
Qualitative vs. Quantitative Analysis
Qualitative Analysis: Results are expressed descriptively or in terms of presence/absence.
Quantitative Analysis: Results are expressed numerically.
The interpretation of an analysis can only be completely correct if the sample is representative. Both sampling and sample preparation are different for each type of analysis and each type of material to be analyzed. However, all methods must:
- Reflect the microbiological conditions of the lot.
- Be collected aseptically
Photosynthesis: Process, Requirements, and Factors Affecting Its Rate
Photosynthesis
Process of Photosynthesis
Photosynthesis is the process by which plants manufacture carbohydrates from raw materials using energy from light.
Equation:
carbon dioxide + water → glucose + oxygen
in the presence of light and chlorophyll
Chemical Equation:
6CO2 + 6H2O —> C6H12O6 + 6O2
Role of Chlorophyll
What is the function of chlorophyll in photosynthesis?
Chlorophyll transfers light energy into chemical energy in molecules, which is then used for the synthesis of carbohydrates.
Use and
Read MorePlant Biology: Vascular Plants, Angiosperms, Gymnosperms, and More
Vascular Plants
Vascular plants are those that have a system of vessels inside that allow the movement of substances and nutrients throughout the plant. Two examples of vascular plants are ferns and Ficcus, a woody plant with no flowers. There are also vascular plants with flowers such as sunflowers, and there are woody plants such as apricot that have a vascular system, yet also have flowers in a process of reproduction.
Angiosperms and Gymnosperms
Angiosperms have covered seeds by fruit (orange,
Read More