Biology final
How many chromosomes are there in a cell during anaphase of mitosis, if the diploid number of the cell is 20?
20
A human gene has two alleles. One allele, P, is dominant over the recessive allele p. Embryos that are homozygous for the dominant allele die in the uterus. What is the expected ratio of genotypes for the live offspring of a heterozygous man and a heterozygous woman?
2:1
What are all the possible phenotypes of children born to a mother with blood group AB and a father with blood group A?
AB, A and O
Tall heterozygous pea plants were crossed and the resulting seeds grown. Out of 360 plants, 270 were tall and 90 dwarf. What describes the expected genotypes resulting from the cross?
All dwarf plants were homozygous.
Which process causes ADP to change to ATP?
Anaerobic cell respiration
In cats, black coat colour is dominant over gray. A female black cat, whose mother is gray, mates with a gray male. What is the predicted ratio of phenotypes in the offspring
Bg, Bg, gg, gg
What is the similarity between DNA and RNA?
Both are polymers of nucleotides.
What is the term for the attraction of water molecules to other water molecules?
Cohesion
Which type of chemical reaction is an example of anabolism?
Condensation
Which statement provides evidence for endosymbiosis?
Eukaryotic mitochondria and chloroplasts have their own circular DNA
What effect do changes in pH have on enzymes?
Extreme pH can alter the active site of all enzymes.
Which organelle is involved in generating vesicles destined for the cell membrane?
Golgi apparatus
If a plant is exposed to light, which colour of light would lead to the lowest rate of oxygen release by a green plant?
Green light
What happens during meiosis I and meiosis II?
Homologue pairs separate during a first round of cell division, called meiosis I. Sister chromatids separate during a second round, called meiosis II.
Which process is an example of catabolism?
Hydrolysis of protein
Which compound is a waste product of anaerobic respiration in humans?
Lactate
At which stage of meiosis are bivalents formed?
Prophase I
Which molecule is depicted in the diagram?
Saturated fatty acid
Which statement applies to meiosis and mitosis?
Separation of chromatids occurs in both meiosis and mitosis.
What is the same in all parts of homologous chromosomes?
Sequence of genes
The salt concentration inside an animal cell is 1.8 %. The salt concentration in the surrounding medium becomes 5 %. What will be the likely response?
The cell will shrink from the loss of water
Some yeast genes can be replaced by human genes that then continue to produce the same human proteins in the yeast cells. Which statement helps to explain this evidence?
The genetic code is universal.
What determines the genomic size of a species?
The total amount of DNA
Which property of water accounts for its moderating effects on the Earth's atmosphere?
Thermal
What special property of phospholipid molecules explains their ability to spontaneously assemble into a lipid bilayer?
They are hydrophobic.
Which molecule is a lipid?
b.
