Biology Review 3

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 positive test for proteins

• a positive test for starches

• a negative test for proteins

• a negative test for starches

A person with swollen gums rinses his mouth with warm salt water, and the swelling decreases. Which has occurred?

• The swollen gums have absorbed the saltwater solution.

• The saltwater solution lowers the temperature of the water in the gums.

• The salt in the solution has moved against the concentration gradient.

• 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?

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Which organism is most likely to use anaerobic respiration?

• bird

• moss

• tree

• yeast

Plant cells that are specialized for cell division are most likely found in what part of a plant?

• root tips

• leaf epidermis

• stem epidermis

• vascular tissue

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?

• They grow at the same rate.

• They live in the same environment.

• They live for the same length of time.

• They evolved from a common ancestor.

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?

• Valine — Isoleucine — Glycine

• Valine — Aspartic Acid — Alanine

• Valine — Isoleucine — Alanine

• Valine — Phenylalanine — Alanine

Which set of parents can most likely produce a child with type O blood?

• one parent with type AB blood, and the other parent with type A blood

• one parent with type AB blood, and the other parent with type O blood

• one parent with heterozygous type A blood, and the other parent with type O blood

• 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?

• cloning

• gel electrophoresis

• gene splicing

• genetic engineering

What process produces many variations in phenotypes?

• independent assortment

• asexual reproduction

• regeneration

• cloning