Bio Sci 93: Midterm 1 study guide Exam Questions with Revised Correct Detailed Answers with
Rationales Guaranteed Pass
1. Order
2. Evolutionary adaptation
3. Regulation
4. Energy processing
5. Growth and development
6. Response to the enviroment
7. Reproduction - correct answer What are the properties of life?
What are emergent properties in order from smallest to biggest? - correct answer 1. Molecules
2. Organelles
3. Cells
4. Tissues
5. Organs
6. Organisms
7. Populations
8. Communities
9. Ecosystems
10. The Biosphere
Cells are... - correct answer an organisms basic unit of structure and function
True or false: The cell is the LOWEST level of structure capable of performing all the activities of
life - correct answer True
What do ALL cells share in common? - correct answer 1. Are enclosed by a membrane
2. Use DNA as genetic information
All life is based on ________ information - correct answer heritable
Do all forms of life use the SAME genetic code? - correct answer Yes, we all have the same
genetic code, although different genes are expressed differently
What does it mean if organisms are open systems? - correct answer 1. They exchange energy
and materials with surroundings
2. The energy exchange involves transformation of energy from one form to another
,Bio Sci 93: Midterm 1 study guide Exam Questions with Revised Correct Detailed Answers with
Rationales Guaranteed Pass
What is an example of structure fits function ("form fits function")? - correct answer Bird wing-
structure or rabbits ears and homeostasis
What is the structural organization of cells? - correct answer 1. Atoms (O,H,C) which are the
foundation
2. Molecules (lipids, proteins, etc) which are formed by combinations of atoms
3. Cells, which are formed by combinations of molecules
Conversions - correct answer Remember:
1m = 1000mm
1mm = 1000 micrometer
1 micrometer = 1000 nm
Important:
1 nm = 1000 picometer
0.1 nm = 1 Angstrom
Elements cannot... - correct answer be broken down into other substances
How many natural elements are there? - correct answer 92 natural elements
How many elements are essential for life? - correct answer 25 essential elements
How much percent of living matter is made from the 4 elements of C, O, N, H? - correct answer
96% of living matter
What are 4 trace elements? - correct answer Fe - Iron
I - Iodine
Zn- Zinc
Cu - Copper
What are atoms? - correct answer the smallest units of chemical elements
What are molecules? - correct answer Two or more atoms combined
, Bio Sci 93: Midterm 1 study guide Exam Questions with Revised Correct Detailed Answers with
Rationales Guaranteed Pass
What are compounds? - correct answer molecule made up of 2 or more elements combined in
a fixed ratio
NaCl (sodium chloride/table salt) is an example of a what? - correct answer Compound
Atoms use ____________ _________ to combine and form molecules and compounds - correct
answer chemical bonds
What are the 2 strong bonds? - correct answer 1. Covalent
2. Ionic
What is a covalent bond? - correct answer the sharing of electrons by two atoms
Tip to remember: Co-workers share jokes together
What is an ionic bond? - correct answer the transfer of electrons between two atoms
*in ionic bonds, electrons will be transferred because one atom will need an electron to
complete its full shell. The other atom transfers it over so that it can also be happy since they
do not want that electron
Ionic bonds occur between... - correct answer a metal and a non-metal
Covalent bonds occur between - correct answer a non-metal and another non-metal
Water is an example of a ________ bond. Why? - correct answer covalent bond
This is because hydrogen and oxygen are both non-metals so they will share electrons
Ammonia, NH3, is an example of a _______ bond. Why? - correct answer covalent bond
Because nitrogen and hydrogen are both non-metals, they will share electrons
Sodium Chloride (NaCl/ Table salt) is an example of a _______ bond. Why? - correct answer
ionic bond
This is because sodium (Na) is a metal, whereas chlorine (Cl) is a metal. More importantly,
chlorine has 7 valence electrons and sodium has 1 valence electron. Chlorine wants to complete
its full shell of 8 electrons, so it wants sodium to donate its one electron. Sodium decides to
donate that one electron because it rather give up the electron to have a positive charge.
Rationales Guaranteed Pass
1. Order
2. Evolutionary adaptation
3. Regulation
4. Energy processing
5. Growth and development
6. Response to the enviroment
7. Reproduction - correct answer What are the properties of life?
What are emergent properties in order from smallest to biggest? - correct answer 1. Molecules
2. Organelles
3. Cells
4. Tissues
5. Organs
6. Organisms
7. Populations
8. Communities
9. Ecosystems
10. The Biosphere
Cells are... - correct answer an organisms basic unit of structure and function
True or false: The cell is the LOWEST level of structure capable of performing all the activities of
life - correct answer True
What do ALL cells share in common? - correct answer 1. Are enclosed by a membrane
2. Use DNA as genetic information
All life is based on ________ information - correct answer heritable
Do all forms of life use the SAME genetic code? - correct answer Yes, we all have the same
genetic code, although different genes are expressed differently
What does it mean if organisms are open systems? - correct answer 1. They exchange energy
and materials with surroundings
2. The energy exchange involves transformation of energy from one form to another
,Bio Sci 93: Midterm 1 study guide Exam Questions with Revised Correct Detailed Answers with
Rationales Guaranteed Pass
What is an example of structure fits function ("form fits function")? - correct answer Bird wing-
structure or rabbits ears and homeostasis
What is the structural organization of cells? - correct answer 1. Atoms (O,H,C) which are the
foundation
2. Molecules (lipids, proteins, etc) which are formed by combinations of atoms
3. Cells, which are formed by combinations of molecules
Conversions - correct answer Remember:
1m = 1000mm
1mm = 1000 micrometer
1 micrometer = 1000 nm
Important:
1 nm = 1000 picometer
0.1 nm = 1 Angstrom
Elements cannot... - correct answer be broken down into other substances
How many natural elements are there? - correct answer 92 natural elements
How many elements are essential for life? - correct answer 25 essential elements
How much percent of living matter is made from the 4 elements of C, O, N, H? - correct answer
96% of living matter
What are 4 trace elements? - correct answer Fe - Iron
I - Iodine
Zn- Zinc
Cu - Copper
What are atoms? - correct answer the smallest units of chemical elements
What are molecules? - correct answer Two or more atoms combined
, Bio Sci 93: Midterm 1 study guide Exam Questions with Revised Correct Detailed Answers with
Rationales Guaranteed Pass
What are compounds? - correct answer molecule made up of 2 or more elements combined in
a fixed ratio
NaCl (sodium chloride/table salt) is an example of a what? - correct answer Compound
Atoms use ____________ _________ to combine and form molecules and compounds - correct
answer chemical bonds
What are the 2 strong bonds? - correct answer 1. Covalent
2. Ionic
What is a covalent bond? - correct answer the sharing of electrons by two atoms
Tip to remember: Co-workers share jokes together
What is an ionic bond? - correct answer the transfer of electrons between two atoms
*in ionic bonds, electrons will be transferred because one atom will need an electron to
complete its full shell. The other atom transfers it over so that it can also be happy since they
do not want that electron
Ionic bonds occur between... - correct answer a metal and a non-metal
Covalent bonds occur between - correct answer a non-metal and another non-metal
Water is an example of a ________ bond. Why? - correct answer covalent bond
This is because hydrogen and oxygen are both non-metals so they will share electrons
Ammonia, NH3, is an example of a _______ bond. Why? - correct answer covalent bond
Because nitrogen and hydrogen are both non-metals, they will share electrons
Sodium Chloride (NaCl/ Table salt) is an example of a _______ bond. Why? - correct answer
ionic bond
This is because sodium (Na) is a metal, whereas chlorine (Cl) is a metal. More importantly,
chlorine has 7 valence electrons and sodium has 1 valence electron. Chlorine wants to complete
its full shell of 8 electrons, so it wants sodium to donate its one electron. Sodium decides to
donate that one electron because it rather give up the electron to have a positive charge.
