Enzymes
Enzymes are biological substances that catalyse chemical
reactions and they regulate the rate at which chemical reactions peoceed
without itself being altered in the process. However, enzymes act on the molecules
called substrate and thereby convert them different molecules known as
products.
Answer:
Which of the following mechanisms is used by gram-negative bacteria to cross the blood-brain barrier? D) Inducing TNF
Explanation:
The blood brain barrier is a barrier formed by brain microvascular endothelial cells, astrocytes and pericytes. Pathogens can cross this barrier by using different mechanisms. The Tumor Necrosis Factor (TNF) is the way gram-negative bacteria cross this mentioned blood-brain barrier.
Die on the cross for us all to take away our sins. Hope that is correct
Answer:
C. Moving a bone back and forth requires the action of at least two muscles.
Explanation:
To move bones in opposite directions muscles must pair up to help move the body part.
