DNA structure, function and replication. DNA is a long molecule that consists of two strands of nucleotides twisted together in a long spiral called a double helix, the base-pairing rules describe which bases pair together in a DNA double helix, work together to produce two identical copies of the original DNA molecule=DNA structure; DNA funcution; RNA; replication; transcription; translation; the two strands are wound round each other to form a double helix. The two strands. Are joined together by hydrogen bonds between the bases, before every cell divison, so that one identical copy can go to each daughter cell =because the two strands of a DNA molcule have complementary base pairs, the nucleotide each can be used as a pattern or template to produce a complementary strand together then form a new DNA double helix, identical to the orginal. The enzyme DNA polymerase then moves along the exposed DNA strand
Answer:
2.Less than 73% of the populations would have only one allele present.
Explanation:
The two alleles chosen do not affect the fitness of flies in the lab environment, so Kerr and Wright could be confident that if changes in the frequency of normal and forked phenotypes occurred, they would not be due to natural selection.
Using a larger breeding population would not be expected to alter the outcome of the experiment.
Answer:
The correct answer is option E.
Explanation:
C4 plants are the plants that utilize the Hatch-Slack pathway or C4 carbon fixation type of photosynthesis process in which carbon dioxide into 4 carbon sugar to move to the Calvin cycle.
These plants are present more commonly in dry and hot climates such as deserts due to their ability to the fixed carbon at a low concentration of carbon dioxide and produce more energy when stomata are closed. Corn, pineapple sugarcane and many more are examples of the C4 plants.
Thus, the correct answer is option - E.
Answer:
A glucose molecule is smaller
Explanation:
An artificial membrane has pores of a specific size.
Molecules that are small enough can pass through the pores, but others may be too big.
Glucose (C₆H₁₂O₆) has a certain size, but a sucrose molecule (C₁₂H₂₂O₁₁) is bigger.
If the membrane pores are just the right size, a glucose molecule will be able to pass through, but a sucrose molecule won't.
