Chapter 3 Review Questions

How many "letters" of an RNA molecule, in sequence, does it take to provide the code for a single amino acid?

3

How many "letters" of an RNA molecule, in sequence, does it take to provide the code for a single amino acid? a. 1 b. 2 c. 3 d. 4

3

The nucleus and mitochondria share which of the following features? a. protein-lined membrane pores b. a double cell membrane c. the synthesis of ribosomes d. the production of cellular energy

A double cell membrane.

What sequence on a DNA molecule would be complementary to GCTTATAT? a. TAGGCGCG b. ATCCGCGC c. CGAATATA d. TGCCTCTC

CGAATATA

Which of the following is not a difference between DNA and RNA? a. DNA contains thymine whereas RNA contains uracil b. DNA contains deoxyribose and RNA contains ribose c. DNA contains alternating sugar-phosphate molecules whereas RNA does not contain sugars d. RNA is single stranded and DNA is double stranded

DNA contains alternating sugar-phosphate molecules while RNAs do not contain sugar.

Place the following structures in order from least to most complex organization: chromatin, nucleosome, DNA, chromosome. a. DNA, nucleosome, chromatin, chromosome b. nucleosome, DNA, chromosome, chromatin c. DNA, chromatin, nucleosome, chromosome d. nucleosome, chromatin, DNA, chromosome

DNA, Nucleosome, Chromatin, Chromosome.

Which of the following phases is characterized by preparation for DNA synthesis? a. G0 b. G1 c. G2 d. S

G1

The structure that packages proteins from the endoplasmic reticulum is the ____ body/apparatus/complex.

Golgi

Which of the following organelles produce large quantities of ATP when both glucose and oxygen are available to the cell? a. mitochondria b. peroxisomes c. lysosomes d. ER

Mitochondria.

Which of the following is a function of the rough ER? a. production of proteins b. detoxification of certain substances c. synthesis of steroid hormones d. regulation of intracellular calcium concentration

Production of proteins.

What structure could be found within the nucleolus? a. chromatin b. histones c. ribosomes d. nucleosomes

Ribosomes

The rough ER has its name due to what associated structures? a. Golgi apparatus b. ribosomes c. lysosomes d. proteins

Ribosomes.

Which of the following is a feature common to all three components of the cytoskeleton? a. They all serve to scaffold the organelles within the cell. b. They are all characterized by roughly the same diameter. c. They are all polymers of protein subunits. d. They all help the cell resist compression and tension.

They are all polymers of protein subunits.

ion pumps and phagocytes are both examples of ______. a. endocytosis b. passive transport c. active transport d. facilitated diffusion

active transport.

Which of the following is part of the elongation step of DNA synthesis? a. pulling apart the two DNA strands b. attaching complementary nucleotides to the template strand c. untwisting the DNA helix d. none of the above

attaching complementary nucleotides to the template strand.

What multipotent stem cells from children sometimes banked by parents? a. fetal stem cells b. embryonic stem cells c. cells from the umbilical cord and from baby teeth d. hematopoietic stem cells from red and white blood cells

cells from the umbilical cord and the baby teeth.

The diffusion of substances within a solution tends to move those substances _____ their ______ gradient. a. up; electrical b. up; electrochemical c. down; pressure d. down; concentration

down; concentration

Which type of stem cell gives rise to red and white blood cells? a. endothelial b. epithelial c. hematopoietic d. mesenchymal

hematopoietic.

Because they are embedded within the membrane, ion channels are examples of ________. a. receptor proteins b. integral proteins c. peripheral proteins d. glycoproteins

integral proteins.

The structure that destroys worn out organelles is the

lysosome

The powerhouse of the cell where most ATP is made is the

mitochondrion

The structure that houses DNA in a eukaryote is the

nucleus

Transcription and translation take place in the ________ and ________, respectively. a. nucleus; cytoplasm b. nucleolus; nucleus c. nucleolus; cytoplasm d. cytoplasm; nucleus

nucleus; cytoplasm.

Choose the answer that best completes the following analogy: Diffusion is to ____ as endocytosis it to _______. a. filtration; phagocytosis b. osmosis; pinocytosis c. solutes; fluid d. gradient; chemical energy

osmosis; pinocytosis.

Arrange the following terms in order of increasing specialization: oligopotency, pleuripotency, unipotency, multipotency. a. multipotency, pleuripotency, oligopotency, unipotency b. pleuripotency, oligopotency, multipotency unipotency c. oligopotency, pleuripotency, unipotency, multipotency d. pleuripotency, multipotency, oligopotency, unipotency

pleuripotency, multipotency, oligopotency, unipotency.

The circular structure which manufactures proteins is the

ribosome

Choose the term that best completes the following analogy: Cytoplasm is to cytosol as a swimming pool containing chlorine and flotation toys is to ________. a. the walls of the pool b. the chlorine c. the flotation toys d. the water

water.

A mutation in the gene for a cyclin protein might result in which of the following? a. a cell with additional genetic material than normal b. cancer c. a cell with less genetic material than normal d. any of the above

any of the above

What is a primary function of tumor suppressor genes? a. stop all cells from dividing b. stop certain cells from dividing c. help oncogenes produce oncoproteins d. allow the cell to skip certain phases of the cell cycle

stop certain cells from dividing.

Which of the following is not made out of RNA? a. the carriers that shuffle amino acids to a growing polypeptide strand b. the ribosome c. the messenger molecule that provides the code for protein synthesis d. the intron

the intron.