QUESTION 23 When water evaporates from your body, you are cooled by the water's low viscosity and low surface tension. O True O False QUESTION 24 Red blood cells are hypertonic to pure water and so when put into a bowl of pure water they will shrink. O True O False QUESTION 25 To make a protein that stays within the cell, the only organelles needed are the following; nucleus, nucleolus, ribosomes, ER (rough), and golgi bodies. O True O False

Question 6 When light hits the special light-reactive molecular units inside rod cells, how do these units respond? They break in half and float into the eye's vitreous humor One bond shifts positions from cis to trans orientation they form a dehydration synthesis reaction with neighboring units, forming cross bridges O they open Na+ channels which rush into the cell Question 7 Which of the following about eyes is NOT RIGHT? O Spiders have image forming eyes O Sea Stars have eye spots O some compound eyes in arthropods have tiny lenses O cephalopods evolved eyes from early vertebrates

Question 38 Which of the following are components of all cells? plasma membrane ribosomes O DNA O All of these are components of all cells Question 39

QUESTION 12 All of the following statements are true about the nucleus EXCEPT Oa. It is surrounded by a nuclear envelope which is a single membrane. Ob. It contains the nucleolus where ribosomal subunits are made. Oc. The nuclear lamina maintains the shape of the nucleus. Od. In the nucleus, DNA combines with proteins to form chromatin. e. The nuclear envelop has pores and allows communication with the cytoplasm.

QUESTION 26 Osmosis and Diffusion of solutes do not require energy input, but active transport and facilitated diffusion need ATP. O True O False QUESTION 27 ATP is a monomer of the nucleic acid family. O True O False QUESTION 28 Cilia and microvilli are both extensions of the phospholipid cell membrane. O True O False

QUESTION 9 The covalent bond that joins amino acids together (once dehydration synthesis has occurred) is called O a disulfide bridge a peptide bond a phosphodiester bond an ester linkage QUESTION 10 DNA contains the sugar_whereas RNA contains_ glucose, fructose O fructose, glucose ribose, deoxyribose deoxyribose, ribose

QUESTION 14 Endoplasmic Reticulum always has ribosomes attached to its surface which is why it's called rER (i.e, rough ER). O True O False QUESTION 15 Prokaryotic cells measure approximately between 1 and 10 and Eukaryotic cells are about 10 to 100. O True O False QUESTION 16 The plasma membrane of a plant or animal cell and the membrane around all organelles (except ribosomes) is a phospholipid bilayer. O True O False

QUESTION 20 Of the components of the cell membrane, transmémbranous proteins and flagella are made of polymers but the phospholipids and cholesterol are not. O True O False QUESTION 21 Transmembranous proteins have both hydrophobic and hydrophilic functional groups. O True O False QUESTION 22 Fatty acids have both hydrophobic and hydrophilic functional groups. O True O False

QUESTION 12 Refer to the figure. Cll membranes Intercellular- space Hydrophillc - channel Molecules - pass between cells Connexins (channel proteins) The type of cell junction shown is necessary where Oa animal cells require a tight structure. O b. animal cells conduct electrical activity, as in the heart. Oe skeletal muscle cells require rapid reflexes. Od. epithelial cells lining animal body caties require structures to prevent contents of the cavities from leaking into the intercellular space Oe skin cells required structures to withstand physical stresses.

Question 21 Identify each characteristic as being either prokaryotic or eukaryotic. has a cell membrane [ Choose ) has membrane bound organelle | Choose ) more complex cells [Choose ) does not have DNA in nucleus | Choose ) simpler cells | Choose ) Does NOT have membrane bound organelle | Choose Animal cells | Choose ) Bacterial cell | Choose ) has cytoplasm [Choose ) > > > > >