Biology semester

Under what laboratory

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Which best decribes how biologists describe the chromosome number in daughter cells after mitosis?assume the parent cell is 1N.

1N

A rat has 42 chromosomes in each somatic cell.how many chromosomes are in each mitotic cell?

42

Glossy leaves are smooth and shiny.what percent of offspring from the cross shown above will have glossy leaves?

50%

Which of the following is a defining characteristic of a prokaryotic cell?

Absence of a membrane bound nucleus

Which of the following statements is true of all cancers cells?

All cancer cells show a lack of control over the cell cycle

A photo micrograph of onion root tip cells during mitosis is shown below.which phase of mitosis is occurring in the cell indicated by the arrow?

Anaphase

Four of the six kingdoms are comprised of organisms that contain eukaryotic cells.which of the following structures in a cell would not be evidence that the cell is eukaryotic?

Cell walls

The p53 gene is activated by damage to the cells DNA to repair the damaged cell in various ways.

Develop a mutation that will force it to dividing continuously

In the enzyme substrate complex what is represented by y?

Enzyme

In a lipid bi-layer which portion of the membrane is hydrophilic?

Lipid heads

Energy conversion withn an animal cell would be severely limited by removal of the cells.........

Mitochondria

What type of asexual reproduction occurs when a cell divides into 2 daughter cells of equal size?

Mitosis

Identify the vent diagram sections which include prokaryotic cells.

One

Both euglena (a eukaryote ) and cyanobacteria are photosynthetic unicellular organisms found in pond water.the feature that distinguishes euglena from cyanobacteria is the-

Presence of a nuclear membrane

When cells leave the cell cycle,they exit during G1 phase and then G0 phase ,a resting period.most normal cells can leave G0 phase and reenter the cell cycle at G1 phase before entering S phase.cancer cells are different because they cannot enter G0 phase and are likely to do which of the following?

Repeat the cell cycle continuously

In which cell structure does protein synthesis occur?

Ribosomes

The synthesis of new proteins takes place in the-

Ribosomes bound to the E.R.

Where does DNA replication occur?

S phase

Which of these best explains why a freshwater aquarium would be dangerous for saltwater fish?

The cells of the saltwater fish would gain to much water

You are testing food solutions for carbohydrates, proteins,and lipids.some of the tests require a hot plate and glassware.what safety precaution should be observed in this situation?

Use only heat resistant glassware without cracks

Which statement applies to eukaryotic cells but not to prokaryotic cells?

Utilize mitochondria during energy production

A mutation of cells could lead to cancer.mutations result from incorrectly copying DNA OF the cells .which of the following correctly lists possible causes of cancer?

Viral infection, smoking tobacco, radiation exposure