PH- extremes denature/ change enzyme shape, so they rate decreases
temp –extreme heat denature/ change enzyme shape, so they rate decreases substrate concentration- as substrate levels decrease, enzyme activity decreases
Answer:
Used the complete extract to incubate nonvirulent cells
Explanation:
Avery and his colleagues injected the extracts from a virulent strain of <em>Streptococcus pneumoniae</em> into the mice and observed that the mice died. They extracted the DNA from the heat-killed virulent strain of<em> Streptococcus pneumoniae.</em> RNAse and proteases enzymes were used to remove the RNA and proteins present in the extract.
This was followed by incubation of mice with DNA extract of virulent heat-killed bacteria and the live non-virulent strain to show that the DNA from heat-killed virulent strain transformed the live non-virulent strain to the virulent one. This was why the mice died of the infection.
However, to ensure that the DNA was present in the virulent cells, they used the complete extract from virulent bacteria without any treatment with RNAse and proteases to transform the nonvirulent cell. It was proved that the DNA was the genetic material for transformation.
C. F1 generation is all Yy (let Y be yellow and y be green). Y is dominant to y. The F2 could be YY, Yy, Yy, or yy. 3:1
Answer: Water moves into and out of cells by osmosis. If a cell is in a hypertonic solution, the solution has a lower water concentration than the cell cytosol, and water moves out of the cell until both solutions are isotonic.
Answer:
Breeding Females. Gilts: Breeding pigs are selected from mother pigs having good mothering ability as shown by large litter size and weight at weaning. Gilts should have 12-14 evenly spaced sound teats, good growth rate and feminity. ... The weaned sows come into heat in 3-10 days after weaning.