SCIN130 Introduction to Biology with Lab

A cell is inhibited during the S phase of its cycle. It will not reproduce due to lack of

DNA synthesis.

A woman inherits a mutant BRCA1 allele from her mother. She has an increased risk of developing breast cancer because

a mutation in her normal BRCA1 allele may lead to cancer, whereas a normal individual would have to acquire two mutations (one in each allele) to develop cancer.

Which is the most common type of intercellular junction between cells of the bladder?

adhesion junctions

Some proteins within a cell can be viewed with ________.

an electron microscope

Apoptosis

can be used to remove damaged or malfunctioning cells.

Chromosomes are

condensed chromatin.

Plant cells have plasmodesmata that

connect the cytoplasm of one cell with that of another

Which is NOT a correct association?

interphase-shortest stage of the cell cycle

During which stage of the cell cycle do the chromosomes duplicate?

interphase: S

Which of the following is a CORRECT matching of an organelle and its function?

mitochondrion - cell respiration

There is an antibiotic called streptomycin that doctors prescribe for infection. The antibiotic combines with the bacteria's ribosomes causing them to lose their function. Consequently the cell dies and so the person gets better! In other words, the antibiotic destroys bacteria by

not allowing them to produce proteins.

Since the plasma membrane blocks the passage of all but a few molecules with specific traits it is necessary for other molecules to

pass through the membrane via proteins.

Plant cells and animal cells differ in cytokinesis because

plant cells need to build a cell wall while animal cells do not.

Movement of chromosomes during anaphase would be most affected by a drug that

prevented shortening of microtubules.

The drug chloral hydrate prevents elongation of microtubules by preventing the addition of new subunits to the growing end. During which stage of mitosis would chloral hydrate be most harmful?

prophase

Which of the following represents the phases of mitosis in their proper sequence?

prophase, metaphase, anaphase, telophase

Where do the vesicles that are being made for secretion from the cell become modified and packaged?

Golgi apparatus

Mitochondria & chloroplasts are similar in that they both ________; but are different in that mitochondria, but not chloroplasts, ______________.

are involved in energy conversions; are found in nearly all eukaryotic cells