Q from Quiz 1 Flashcards
Which of the following systems are not capable of producing antibodies that attach to foreign substances? (Select all that apply)
Lymphatic, Endocrine, Cardiovascular, Immune
Lymphatic, Endocrine, Cardiovascular
Using the figure depicting homeostatic imbalance, which letter would represent the “output?”
D
Which of the following system plays a role in protecting underlying organs from environmental damage and synthesizes vitamin D?
Skeletal, Nervous, CVS, Muscular, Integumentary
Integumentary
What feedback mechanism is used during childbirth?
Positive Feedback mechanism
T/F Responsiveness or irritability is the ability to sense changes in the environment and then respond to them.
True
Which of the following are functional characteristic of life? (Select all that apply).
Decay, movement, responsiveness, maintenance of boundaries
movement, reponsiveness, and maintenance
A bond in which electrons are completely lost or gained by the atoms involved.
ionic bond
T/F Isotopes differ from each other only in the number of electrons the atom contains.
false
t/f A dipeptide can be broken into two amino acids by dehydration synthesis.
false
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.
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.
Carbohydrates are stored in the liver and muscles in the form of ________.
glycogen
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.
Enzymes work by raising the energy of activation.
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
secondary
Starch is the stored carbohydrate in plants, while ________ is the stored carbohydrate in animals. (WRONG spelling, WRONG answer)
glycogen
t/f In osmosis, movement of water occurs toward the solution with the lower solute concentration.
false
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.
The cells will lose water and shrink.
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.
Messenger RNA, transfer RNA, and ribosomal RNA play a role in protein synthesis.
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.
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.
The RNA responsible for bringing the amino acids to the ribosome for protein formation is ________.
rRNA
mRNA
ssRNA
tRNA
