4/18/23 Review Warm-up

A piece of refrigerated, cooked meat will remain safe to eat for a longer period of time than a refrigerated piece of raw meat of similar size. Which statement is a valid inference based on this information?

• Cooking meat kills many bacteria and fungi

• Cool temperatures stimulate the growth of microbes on raw meat.

• Raw meat cannot be preserved.

• Cooked meat contains antibodies that destroy decomposers.

The ameba represented in the diagram below is a single-celled organism. Which two processes are most closely associated with structure A?

• insertion and deletion

• nervous regulation and circulation

• active transport and diffusion

• replication and photosynthesis

If the ribosomes of a cell were destroyed, what effect would this most likely have on the cell?

• It would stimulate mitotic cell division.

• The cell would be unable to synthesize proteins.

• Development of abnormal hereditary features would occur in the cell.

• Increased protein absorption would occur through the cell membrane.

If a gene is inserted into the DNA of a bacterial cell, every cell produced by that cell will have

• DNA that is different from that of the other cells produced

• a 50% chance of having a copy of the inserted gene

• a copy of the inserted gene

• a new type of DNA base

The shape of a protein is most directly determined by the

• amount of energy available for synthesis of the protein

• kind and sequence of amino acids in the protein

• type and number of DNA molecules in a cell

• mistakes made when the DNA is copied

If a chemical that interrupts cell division is added to a culture of human liver tissue, which process would stop?

• meiosis

• mitosis

• breakdown of glucose

• diffusion of nutrients

One possible pathway for the evolution of elephants is represented in the diagram. Which statement concerning this pattern of evolution is correct?

• Evolution always results in favorable traits

• Evolution does not always result in a species that will survive to present time.

• Evolution leads to less complex organisms.

• Evolution results in the same changes in all species.

A boy inherits genes for tallness, but his growth is limited as a result of poor nutrition. This is an example of

• an inherited disorder

• environmental influence on gene expression

• expression of a hidden trait

• a characteristic controlled by more than one pair of genes

The diagram represents a technique currently used by scientists in the field of biotechnology. Which statement describes a possible outcome of this technique?

• The bacterium is able to produce the protein produced by the human cell.

• It allows the bacterium to grow in humans, since it contains a human gene.

• It allows humans to become immune to an infection from this type of bacteria

• The bacterium can now produce human cells identical to cells of the DNA donor

Which statement describes starches, fats, proteins, and DNA?

• They are used to store genetic information.

• They are complex molecules made from smaller molecules

• They are used to assemble larger inorganic materials.

• They are simple molecules used as energy sources.