All Summarised YouTube Videos
Explore curated summaries of YouTube videos that have been generated on DIGEST YOUTUBE.
Summarise a Video for free
A Level Biology Revision "The Effect of Substrate Concentration and Enzyme Concentration on Enzymes" | Freesciencelessons YouTube Video Summary
This Freesciencelessons video explains how substrate and enzyme concentrations impact enzyme activity. The video begins by explaining that the rate of reaction depends on how frequently substrate molecules collide with the enzyme's active site, relating frequency to the number of collisions per second. It then explains that the rate of the enzyme catalysed reaction increases, until the enzymes active site is saturated, at which point the enzymes are working at their fastest rate, known as Vmax. The video then moves on to how enzyme concentration affects the rate of reaction, and explains that the higher the enzyme concentration, the quicker the rate of reaction, and if you double the enzyme concentration, you double the number of active sites.
Freesciencelessons
3 mins
about 4 years ago
A Level Biology Revision "The Effect of pH on Enzymes" | Freesciencelessons YouTube Video Summary
This video by Freesciencelessons teaches the effect of pH on enzymes. The video starts off with how enzymes work fastest at a specific optimum pH. When the pH changes away from the optimum pH, the rate of reaction decreases because the R groups and the concentration of hydrogen ions present starts to break the bonds which can change the shape of the active site.
Freesciencelessons
5 mins
about 4 years ago
A Level Biology Revision "The Effect of Temperature on Enzyme Controlled Reactions" | Freesciencelessons YouTube Video Summary
This video by Freesciencelessons teaches A-level biology students about the effects of temperature on enzyme-controlled reactions. It explains how reaction rates increase with temperature up to the optimum, and then decrease as enzymes denature. The video introduces the temperature coefficient (Q10) and explains its application to enzyme reactions.
Freesciencelessons
4 mins
about 4 years ago
A Level Biology "Non-Competitive Inhibitors" | Freesciencelessons YouTube Video Summary
This Freesciencelessons video explains the effect of non-competitive inhibitors on enzyme catalysed reactions. Competitive inhibitors can reduce the rate of enzyme catalysed reaction. Unlike a competitive inhibitor, non-competitive inhibitors do not bind to the active site of an enzyme, rather they bind to a different site on the enzyme molecule called the allosteric site.
Freesciencelessons
2 mins
about 4 years ago
A Level Biology Revision "Competitive Inhibitors" | Freesciencelessons YouTube Video Summary
This Freesciencelessons video covers competitive inhibitors, which are molecules that bind to the active site of an enzyme and prevent the substrate from binding. Competitive inhibitors compete with the substrate for the active site. By increasing the concentration of the substrate, the effect of the competitive inhibitor can be reduced.
Freesciencelessons
5 mins
about 4 years ago
🔴LIVE : News 1st: Prime Time English News - 9 PM | 07.09.2025 | Newsfirst Sri Lanka YouTube Video Summary
This "Newsfirst Sri Lanka" live broadcast presents a compilation of recent news. The segment includes headlines about an additional district judge's dismissal, action against dangerous vehicle accessories, and the Ella bus tragedy. Other reports covered the discovery of chemical substances, debate on curbing crime, and the resignation of Japan's prime minister.
Newsfirst Sri Lanka
35 mins
about 1 month ago