Biology lecture 1

prokaryotic cell

does not have a membrane-bound nucleus

Select the correct association

carbohydrates—include glucose, sucrose, and starch

A molecule is said to be organic if it contains

carbon and hydrogen atoms

Chromosomes are made from

condensed chromatin

Plant cells have plasmodesmata that

connect the cytoplasm of one cell with that of another.

DNA functions to________, while RNA's function is to________.

stores genetic information; aids in the processing of the information within the DNA into proteins

One carbon atom can form up to________ covalent bonds with other atoms.

4

An organic molecule is differentiated from an inorganic molecule by the presence of

C and H

How does DNA differ from RNA?

DNA is comprised of a double-strand; RNA is a single-strand

In which of the following monomers is correctly matched with its polymer?

amino acid, protein

A gene is the code for assembling a sequence of

amino acids

Sugar dissolves in coffee because

Water is a good solvent

Phosphorus has an atomic number of 15. How many valence shell electrons does it have?

five

Humans store glucose in the form of

glycogen

Some insects can walk on the surface of water because water

has surface tension

An atom that has an electrical charge is called a(n)

ion

Which of the following correctly lists the parts of a nucleotide of RNA

nitrogen-containing base, ribose, phosphate

Both the nuclear membrane and the plasma membrane are composed of

phospholipids

Starch is a________ made of many________.

polymer ... glucose molecules

What functional group makes a carbohydrate hydrophilic?

-OH

Refer to the figure. Which of the following is true regarding the labeled plasma membrane?

Parts W and Z are hydrophilic.

ATP is a molecule used for energy transport inside the cell. The components of ATP are a nitrogen-containing base, a 5-carbon sugar, and three phosphate groups. Given this structure, ATP is classified as a(n)

nucleic acid

Which of the following statements describes the function of a chloroplast?

It converts light energy into chemical energy

Which one of the following is a potential danger of anabolic steroids?

Liver problems Psychological disorders Heart problems Male breast development

Which of the following is an example of the heat capacity of water?

Living organisms are able to maintain their internal body temperatures because the water in their cells resists changes in temperature.