BIOL 1201 TEST 1

12

An atom having an atomic number of 10 and a mass of 22 would be expected to have _____ neutrons A. 10 B. 12 C. 16 D. 22 E. 32

amino acid, triglyceride, lysosome, human fibroblast cell

Place the following in the correct order from smallest to biggest. A. human fibroblast cell, amino acid, lysosome, triglyceride B. triglyceride, human fibroblast cell, amino acid, lysosome C. amino acid, lysosome, triglyceride, human fibroblast cell D. triglyceride, amino acid, lysosome, human fibroblast cell E. amino acid, triglyceride, lysosome, human fibroblast cell

4

The H+ concentration in a cola is 1x10-4 M. What is the pH of the solution? A. 4 B. 7 C. 40 D. -7 E. 10-4

C60H102O51

The molecular formula of glucose is C6H12O6. What would be the molecular formula of a polymer made by linking ten glucose molecules together by dehydration reactions? A. C60H120O60 B. C60H118O59 C. C60H102O51 D. C60H100O50 E. C60H111O51

an atom with 20 protons, 21 neutrons, and 20 electrons

The most common form of calcium has 20 protons, 20 neutrons, and 20 electrons. Which of the following elements would be an isotope of calcium? A. an atom with 21 protons, 20 neutrons and 21 electrons B. an atom with 20 protons, 20 neutrons, and 18 electrons C. an atom with 20 protons, 21 neutrons, and 20 electrons D. an atom with 21 protons, 21 neutrons, and 21 electrons E. all of the above atoms are isotopes of calcium

nucleic acid

The nucleus and mitochondria contain ______, but the lysosome and the cell wall do not. A. carbohydrate B. lipid C. protein D. nucleic acid E. all of the above

alive

While at the store you buy some celery. The cells in the celery stalks are ______. A. dead B. dead, but they might come back to life if you planted or left it in a cabinet for a while C. alive D. alive, but metabolically inactive E. alive. but in a coma

the bag had > 0.5 M sucrose initially and a lower concentration after 20 minutes

A bag with an unknown sucrose concentration made of an artificial membrane with pores large enough to let water pass, but not sucrose was placed in a solution of 0.5 M sucrose. After 20 minutes, the bag was removed and it had gotten bigger. Which statement below is probably true? A. the bag had > 0.5 M sucrose initially and a higher concentration after 20 minutes B. the bag had > 0.5 M sucrose initially and a lower concentration after 20 minutes C. the bag had a concentration of 0.5 M all of the time D. the bag had < 0.5 M sucrose initially and a higher concentration after 20 minutes E. the bag had < 0.5 M sucrose initially and a lower concentration after 2o minutes

0.01 mm

A cell has a diameter of 10 micrometers. What is that distance in millimeters? A. 10 mm B. 1 mm C. 0.1 mm D. 0.01 mm E. 0.001 mm

it should dissolve in water

A compound contains hydroxyl groups as its predominant functional group. Which of the following statements is true conceding this compound? A. It should dissolve in water. B. It is probably a lipid. C. It should dissolve in olive oil. D. It won't form hydrogen bonds with water. E. All of the above answers are correct.

hydrophobic

A molecule that has all non polar covalent bonds would be _____. A. Hydrophilic B. Hydrophobic C. Acidic D. Basic E. Ionic

the cell membranes

A protein known as a phospholipase removes fatty acids from phospholipids. What cellular structure would be most affected by this enzyme? A. the cell membranes B. cellulose in the cell wall C. the chromosomes D. the soluble cell proteins E. the glucose in the cell

8 and 17

An element has 8 protons, 9 neutrons, and 8 electrons. Its atomic number and atomic mass, respectively, are ______. A. 8 and 16 B. 8 and 17 C. 9 and 16 D. 9 and 17 E. 17 and 25

NH3 + H+ --> NH4+

Based on the dissociation patterns shown below which of the following would be considered a base? A. NH3 + H+ --> NH4+ B. HCl --> H+ and Cl- C. NaCl --> Na+ and Cl- D. KCl --> K+ and Cl- E. H2O --> H+ and OH-

12C and 13C are both stable

Consider the isotopes of carbon, 12C, 13C, and 14C. Which of them is/are stable? A. only 12C is stable B. only 13C is stable C. only 14C is stable D. 12C and 13C are both stable E. 12C, 13C, and 14C are all stable

C4H8O4

Erythrose, a carbon 4 sugar, has the following chemical formula. A. C4H7O3 B. C4H7O4 C. C4H4O4 D. C4H8O4 E. C6H12O6

Water can form hydrogen bonds with the protein

How do water molecules interact with large molecules like a protein? A. Water molecules form covalent bonds with the proteins B. Water molecules form ionic bonds with the protein C. Water can form hydrogen bonds with the protein D. Answers a and c are correct E. Answers b and c are correct

two covalent bonds

How many and what type of bonds does sulfur usually form in biology? A. one covalent bond B. two covalent bonds C. three covalent bonds D. one ionic bonds E. two ionic bonds

all of the above answers are correct

Hydrogen bonding between water molecules influences A. an insect's ability to walk on water B. the ability of a tree to transfer water from the roots to the leaves C. the ability of water to store large quantities of heat D. all of the above answers are correct E. all of these functions of proteins

facilitated diffusion

If glucose entering the cell from the blood, goes through the GLUT2 carrier protein and goes from a high to low concentration. What type of transport is occurring? A. simple diffusion B. facilitated diffusion C. active transport D. endocytosis E. phagocytosis

testing the hypothesis

In the scientific method, which is the next step after taking an hypothesis? A. making a conclusion B. proving the hypothesis is incorrect C. testing the hypothesis D. argue with other scientists E. proving the hypothesis is correct

the rough endoplasmic reticulum

Insulin, a protein excreted by pancreas cells is made on ________. A. ribosomes bound to the nuclear envelope B. free ribosomes in the cytoplasm C. the rough endoplasmic reticulum D. in the mitochondria E. ribosomes bound to the plasma membrane

they are all disaccharides

One characteristic shared by sucrose, lactose, and maltose is that _____. A. they are all polysaccharides B. they are all disaccharides C. they are all monosaccharides D. they all contain fructose E. they cannot be digested by humans

5' A-C-A-C-T-T-G-G 3'

One strand of DNA has the sequence 5' C-C-A-A-G-T-G-T 3'. What is the sequence of the complementary strand? A. 5' G-G-T-T-C-A-C-A 3' B. 5' G-G-U-U-C-A-C-A 3' C. 5' T-T-G-G-A-C-A-C 3' D. 5' A-A-C-C-T-G-T-G 3' E. 5' A-C-A-C-T-T-G-G 3'

have different numbers of protons

Oxygen and sulfur atoms A. have different numbers of protons B. have different numbers of valence electrons C. form different numbers of chemical bonds D. all of the above answers are correct E. none of the above answers are correct

protein

The cytoskeleton is composed of _________. A. carbohydrate B. lipid C. protein D. nucleic acid E. all of the above

tertiary structure

The overall three-dimensional shape of a single polypeptide is called the ________. A. Double-helix B. Primary structure C. Secondary structure D. Tertiary structure E. Quaternary structure

all of the above

This component is found in eukaryotic cells ______. A. carbohydrate B. lipid C. protein D. nucleic acid E. all of the above

phagocytosis

We saw a neutrophil engulf a bacterium in a video at the beginning of the semester. What type of transport is occurring? A. simple diffusion B. facilitated diffusion C. active transport D. endocytosis E. phagocytosis

1x10-10 M

What is the OH- concentration of the cola if it has a pH of 4. A. 4 M B. 7M C. 1x10-4 M D. 1x10-7 M E. 1x10-10 M

ionic bond

What type of bond results from a complete transfer of electron(s) between atoms? A. hydrogen bond B. hydrophobic interaction C. nonpolar covalent bond D. polar covalent bond E. ionic bond

triglyceride

Which is an example of a lipid? A. insulin B. chitin C. maltose D. triglyceride E. ATP

12C, 13C, and 14C are all found in nature

Which of the carbon isotopes, 12C, 13C, and 14C is/are found in nature or naturally occurring? A. 12C is naturally occurring B. 13C is naturally occurring C. 14C is naturally occurring D. 12C and 13C are naturally occurring E. 12C, 13C, and 14C are all found in nature

the protein sequence is leucine - valine - glycine

Which of the following is an example of primary protein structure? A. when the subunits of hemoglobin come together to form the whole protein B. when a protein folds up to its final form C. the protein sequence is leucine - valine - glycine D. a Beta sheet occurs E. All of the above examples of primary structure

mitochondria

Which of the following structures is found in eukaryotic, but not prokaryotic cells? A. Cytoplasm B. RNA C. Mitochondria D. Plasma membrane E. All of these structures are in both eukaryotic cells and prokaryotic cells

R-NH2

Which one of the following functional groups is a weak base? A. R-NH2 B. R-SH C. R-COOH D. R-OH E. All of the above are weak bases

plasma membrane

Which organelle prevents small charged molecules like Na+ from rapidly entering the cell? A. mitochondria B. nucleus C. cell wall D. lysosome E. plasma membrane

beta-glycosidic linkages

Which type of linkage connects glucose units in cellulose? A. beta-glycosidic linkages B. peptide bonds C. 3' - 5' phosphodiester linkages D. disulfide bonds E. unsaturated linkages

proteins

Which type of macromolecule listed below contains sulfur? A. proteins B. carbohydrates C. nucleic acids D. lipids E. all of the above contain sulfur

a plant cell

You are looking at a cell under the microscope. It has a nucleus, a large vacuole and many chloroplasts. What type of cell is it? A. a photosynthetic bacteria B. a plant cell C. a fungal cell D. answers a and b both could be correct E. answers a, b, and c all could be correct