Biology Exam 1

Isotopes of an element differ in their _____.

neutron number

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

nitrogen-containing base, ribose, phosphate

Which of the following structures would NOT be seen in a prokaryotic cell?

nucleus

A general eukaryotic cell is typically in the area of

10-100 micrometers.

An element has an atomic number of 78. The number of protons and electrons in a neutral atom of the element are

78 protons & 78 electrons

The three domains of life are

Archaea, Bacteria, Eukarya

Which one of the following is the smallest unit of matter that has all the properties of an element?

Atom

Based on the evolutionary tree of the three domains, which of the following is true?

All three domains have a common ancestor.

In the diagram below, the monomer that serves as the subunit to creating this organic molecule category is called _________.

Nucleotide

Female fireflies emit flashes of light that attract males. This communication is an example of which characteristic of life?

interaction with the environment

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

ion

The number of neutrons in the nucleus of an average atom of an element is best estimated by

subtracting the number of protons from the mass number.

The pH scale is a mathematical indicator of

the concentration of H+ present in a solution

Prokaryotes belong to _______________.

Domain Archaea

After spending an hour working outside in the hot, sunny weather, a person typically perspires and will need to drink water. This is part of

Maintaining Homostatsis

_____ are bacterial structures involved in the passage of DNA into or out of the cell.

Conjugation pili

Deoxyribose is a sugar found in ________.

DNA

How does DNA differ from RNA?

DNA is comprised of a double strand, RNA is a single strand.

Biosphere is the Community and its non-living surrounding

False

All single-celled organisms are prokaryotes.

False because some eukaryotes, including protista, are single-celled.

Disease-causing bacteria often attach to cells they attack. The bacterial structures used to aid that attachment are ________.

Fimbriae

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

Golgi apparatus

A coke has a pH of 3.5. This means that it has an excess of _______ ions and would be called a(n) _____

H+; acid

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

It converts light energy into chemical energy.

The process of _____________________ transforms solar energy into chemical energy

Photosynthesis

Regarding atoms, identify which statement below is correct.

The number and arrangement of electrons in an atom governs its chemical activity.

Which of the following statements, is not true with respect to scientific theory?

Theories are possible explanations for natural events.

Which of these does not occur when a sodium atom transfers an electron to a chlorine atom?

There is a sharing of the electrons between the sodium and chlorine atoms.

Large, hydrophilic molecules need to combine with a transporter protein to pass through the membrane

True

Taxonomy is the science of classification of living organisms

True

The plasma membrane's hydrophilic part faces the outside of the cell and the cytoplasm

True

Which nitrogen containing base is found in RNA but not in DNA?

Uracil

Which of the following terms is not correctly matched with a correct example?

a mosquito feeding on a human host - community

A nucleotide is made of which of the following chemical components?

a nitrogen-containing base, a phosphate group, and a sugar

In which of the following is the correct monomer matched with its polymer?

amino acid - protein

Which of the following would describe a polypeptide?

amino acids joined by dehydration synthesis reactions

The only molecules that can pass freely through the plasma membrane are ones that

are ones that are polar

Which of the following is NOT associated with proteins?

are used to produce DNA

All atoms of the same element have the same

atomic number

Mitochondria are found in

both plant cells and animal cells

The smallest unit of life is a

cell

Which of the following lists the terms from simplest to most complex

cells, tissues, organs, organ systems, organism

All cells have some characteristics in common; both prokaryotic and eukaryotic cells have

cytoplasm, a plasma membrane and DNA.

The following figure represents which process?

dehydration synthesis

An atom's outermost electron shell

determines its chemical reactivity

Which of the following would be best to view all the organelles of a cell with?

electron microscope

A covalent bond occurs when ________.

electrons are shared between two atoms to complete their octets.

If a material mixes readily with water it is identified as _________.

hydrophilic

An atom with a neutral charge has

equal numbers of protons and electrons

The purpose of a control group in an experiment is

for comparison to the other test groups.

Select the INCORRECT association.

fructose....a polysaccharide

Which of the following is matched incorrectly?

gene - organelle

Which of the following words does NOT belong with the others?

glycogen

Which of the following is NOT a dehydration synthesis reaction?

glycogen forming glucose molecules

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

mitochondrion - cell respiration

Which of the following is in correct order from smallest to largest?

peptide - polypeptide - protein

Elements differ from each other in their ________.

physical properties and atomic number

Identify the organelle - function pairing that is INCORRECT.

plasma membrane - provides strength to plant cell walls

Both plants & animals need mitochondria to

produce ATP

A water molecule, as shown here, is polar because of

unequal sharing of electrons