Q from Quiz 1

Question 1

Which of the following systems are not capable of producing antibodies that attach to foreign substances? (Select all that apply)
Lymphatic, Endocrine, Cardiovascular, Immune

Answer 1

Lymphatic, Endocrine, Cardiovascular

Question 2

Using the figure depicting homeostatic imbalance, which letter would represent the “output?”

Answer 2

D

Question 3

Which of the following system plays a role in protecting underlying organs from environmental damage and synthesizes vitamin D?
Skeletal, Nervous, CVS, Muscular, Integumentary

Answer 3

Integumentary

Question 4

What feedback mechanism is used during childbirth?

Answer 4

Positive Feedback mechanism

Question 5

T/F Responsiveness or irritability is the ability to sense changes in the environment and then respond to them.

Answer 5

True

Question 6

Which of the following are functional characteristic of life? (Select all that apply).
Decay, movement, responsiveness, maintenance of boundaries

Answer 6

movement, reponsiveness, and maintenance

Question 7

A bond in which electrons are completely lost or gained by the atoms involved.

Answer 7

ionic bond

Question 8

T/F Isotopes differ from each other only in the number of electrons the atom contains.

Answer 8

false

Question 9

t/f A dipeptide can be broken into two amino acids by dehydration synthesis.

Answer 9

false

Question 10

Which of the following is are true of proteins?
They may be denatured or coagulated by heat or acidity.
Their function depends on their three-dimensional shape.
They have both functional and structural roles in the body.
They appear to be the molecular carriers of coded hereditary information.

Answer 10

They may be denatured or coagulated by heat or acidity.
Their function depends on their three-dimensional shape.
They have both functional and structural roles in the body.

Question 11

Carbohydrates are stored in the liver and muscles in the form of ________.

Answer 11

glycogen

Question 12

Which of the following does NOT describe enzymes?
Each enzyme is chemically specific.
Enzymes work by raising the energy of activation.
Some enzymes are purely protein.
Some enzymes are protein plus a cofactor.

Answer 12

Enzymes work by raising the energy of activation.

Question 13

What level of protein synthesis is represented by the coiling of the protein chain backbone into an alpha helix?
  secondary structure 
  quaternary structure 
  primary structure 
  tertiary structure

Answer 13

secondary

Question 14

Starch is the stored carbohydrate in plants, while ________ is the stored carbohydrate in animals. (WRONG spelling, WRONG answer)

Answer 14

glycogen

Question 15

t/f In osmosis, movement of water occurs toward the solution with the lower solute concentration.

Answer 15

false

Question 16

If cells are placed in a hypertonic solution containing a solute to which the membrane is impermeable, what could happen?

The cells will show no change due to diffusion of both solute and solvent.
The cells will shrink at first, but will later reach equilibrium with the surrounding solution and return to their original condition.
The cells will swell and ultimately burst.
The cells will lose water and shrink.

Answer 16

The cells will lose water and shrink.

Question 17

Which of the following statements is correct regarding RNA?

If the base sequence of DNA is ATTGCA, the messenger RNA template will be UCCAGU.
RNA is always attached to the rough ER.
There is exactly one specific type of mRNA for each amino acid.
Messenger RNA, transfer RNA, and ribosomal RNA play a role in protein synthesis.

Answer 17

Messenger RNA, transfer RNA, and ribosomal RNA play a role in protein synthesis.

Question 18

Which statement is the most correct regarding transcription/translation?

The nucleotide sequence in a mRNA codon is an exact copy of the DNA triplet that coded for it except that uracil is substituted for thymine.
The nucleotide sequence in a mRNA codon is an exact copy of the DNA triplet that coded for it.
The nucleotide sequence in a tRNA anticodon is an exact copy of the DNA triplet that coded for it.
The nucleotide sequence in a tRNA anticodon is an exact copy of the DNA triplet that coded for it except that uracil is substituted for thymine.

Answer 18

The nucleotide sequence in a tRNA anticodon is an exact copy of the DNA triplet that coded for it except that uracil is substituted for thymine.

Question 19

The RNA responsible for bringing the amino acids to the ribosome for protein formation is ________.

Answer 19

rRNA
mRNA
ssRNA
tRNA