quarterly 3 mastering

The nuclei of eukaryotic cells are characterized by

A double membrane

What is the difference between "free" and "attached" ribosomes?

Free ribosomes occur in the cytoplasm, whereas attached ribosomes are found on the endoplasmic reticulum

All cells possess all of the following components EXCEPT

a nuclear membrane

Which of the following is a source of replacement electrons for photosystem II during photosynthesis?

h2o

If you forget to water your favorite plant, all of the following will occur at a cellular level EXCEPT

turgor pressure will build up in the cell

Light reactions produce

ATP, NADPH, and O2.

Two similar-sized animal cells are placed in a 0.5% sucrose solution. Cell A enlarges for a while and then stops; cell B continues to enlarge and finally ruptures. Which of the following must have been true at the beginning of the experiment?

Cell B has a higher concentration of sucrose than cell A.

How does gel electrophoresis help when analyzing samples of DNA?

It separates DNA fragments by length

How can a single gene code for more than one protein?

The exons within an mRNA can be spliced together in different ways

How do scientists generate large amounts of a particular piece of DNA they wish to work with?

They insert the DNA into a bacterial plasmid.

Why do scientists make plants and farm animals that are transgenic for human antibodies and hormones?

This is a way to produce large amounts of these products cheaply

What is the current status of transgenic food products in the United Status?

Transgenic food is commonly found in the grocery store

Active transport requires all of the following EXCEPT:

aquaporins

Which of the following occurs in the nucleus?

both transcription and replication of genetic material

Plasma membranes are best described as a

double layer of phospholipids with hydrophobic tails oriented toward one another

The secretion of excess water via a vesicle of a Paramecium cell is an example of

exocytosis.

The hydrophilic regions of a membrane protein are most likely to be found

exposed on the surface of the membrane.

Lactose is a disaccharide of glucose and galactose, and its digestion requires the actions of the enzyme lactase. If lactose is eaten as part of the diet but is not digested by lactase, this sugar is then metabolized by bacteria in the intestine, leading to the symptoms of lactose intolerance. Lactose intolerance, therefore, results from a(n)

lack of hydrolysis of lactose.

Human muscle cells can perform

lactic acid fermentation and aerobic cellular respiration

Human eye color is the result of

polygenic inheritance

Transcription is the process of

synthesizing an RNA molecule using a DNA template

Traits controlled by sex-linked recessive genes are expressed more often in males because

the male has only one gene for the trait

Glucose synthesis during photosynthesis requires that

the products of light-dependent reactions must be available

A mutant plant cell with no chloroplasts would

till be able to use carbohydrates as an energy source

Which of the following binds to codons?

transfer RNA