Answer: Three molecules
Explanation: For every three molecules of CO2 that enters the Calvin cycle (light independent reaction), one molecule of the three carbon glyceraldehyde 3-phosphate (G3P) is produced. Two molecules of G3P are needed to produce one molecule of glucose.
D. The repressor is freed from the operator when lactose is present.
Think of a bacteria that comes into contact with some lactose sugar in milk. Normally it's not in milk, so the gene is repressed (prevented) from making the lac enzyme (which digests lactose). Now when it comes across some milk, it wants to make as much lac as possible to eat up all the lactose.
FYI: trp for tryptophan works the exact opposite with repressor blocking when trp IS PRESENT.
Answer:
A
Explanation:
this is because, in smaller organism their SA/V ratio is large hence they have efficient transport of materials within their cells
Answer:
Lactoferrin, lysozyme and peroxidase.
Explanation:
Lactoferrin, lysozyme and peroxidase are the substances which are present in the saliva and tears and work as a first line of defense in the body against harmful microorganisms in humans and animals. Lactoferrin helps to protect the body fromagainst DNA or RNA based viruses such as rotavirus and HIV. Lysozyme is a type of enzyme which prevents the growth of bacteria by breaking down the cell wall of bacteria.
Answer:
C. Both (a) and (b)
Explanation:
Hunting, destroying habitats, polluting and introducing non-native species can cause extinction.
