A nucleotide consists of three different sub-units. A section of double-stranded DNA consists of 600 of these sub-units in total. Of these sub-units, 28 are the base adenine. What percentage…
The table below gives some information about the number and biomass of organisms in thefood chain:rose bush → aphid → ladybirdorganism number oforganismsbiomass at eachlevel(arbitrary units)rose bush 1 800aphid 4000…
Which of the following statements is/are correct for a healthy human?1 A protein section coded for by part of a gene consisting of 500 base pairs will have a maximum…
An animal cell is surrounded by a very dilute glucose solution which has a lower concentration of glucose than the glucose solution in the cytoplasm of the cell. There is…
The family tree shows the inheritance of freckles. Which row in the table shows the probability that the next child produced by parents 1 and 2, and the probability that…
Which statements describe a role of mitosis?1 asexual reproduction2 growth of a cell3 repair of cells4 stem cell division Answer: 21) A 1 – mitosis does not involve a mate.…
Mitochondria are the site of aerobic respiration in animal cells. A theory of the evolution of animal cells states that these mitochondria may once have been aerobic bacteria that were…
In order to function, the cells of the brain need large amounts of energy. Any reduction in thefunction of these cells can have serious consequences for the body. For example,…
Which of the following could be found in an adult liver cell? gene for amylase sex chromosomes starch Answer: 21) E The complete set of genes of an organism is…
In a monohybrid genetic cross a ratio of phenotypes of 3:0 rather than the usual 3:1 ratio wasseen. This could be due to:1 offspring with both dominant alleles not surviving.2…