An iodine solution is placed on the cut side of a potato. Within seconds, a blue-black color appears. What is most likely occurring?
A a positive test for proteins
B a positive test for starches s
C a negative test for proteins
D a negative test for starches
A person with swollen gums rinses his mouth with warm salt water, and the swelling decreases. Which has occurred?
A The swollen gums have absorbed the saltwater solution.
B The saltwater solution lowers the temperature of the water in the gums.
C The salt in the solution has moved against the concentration gradient.
D The water in the gums has moved from a high to a low concentration of water.
This diagram represents a cell.
Which organelle is the site where amino acids are synthesized into proteins?
A 1
B 2
C 3
D 4
Which organism is most likely to use anaerobic respiration?
A bird
B moss
C tree
D yeast
Plant cells that are specialized for cell division are most likely found in what part of a plant?
A root tips
B leaf epidermis
C stem epidermis
D vascular tissues
This diagram represents the bone structures of the front limbs of four different animals.
What do the similarities of the structures suggest about these organisms?
A
B
C
D
This chart represents amino acids that are coded from different combinations of mRNA codons.
Which amino acid sequence can be coded from the DNA sequence CAG TAG CGA?
A Valine — Isoleucine — Glycine — Alanine
B Valine — Aspartic Acid
C Valine — Isoleucine — Alanine
D Valine — Phenylalanine — Alanine
Which set of parents can most likely produce a child with type O blood?
A one parent with type AB blood, and the other parent with type A blood
B one parent with type AB blood, and the other parent with type O blood
C one parent with heterozygous type A blood, and the other parent with type O blood
D one parent with homozygous type A blood, and the other parent with homozygous type B blood
This diagram represents samples of DNA that were cut with a restriction enzyme during DNA fingerprinting in a crime lab. Which technique was used to produce these bands?
A cloning
B gel electophoresis
C gene splicing
D genetic engineering
What process produces many variations in phenotypes?
