Bio 1

The nearly universal nature of the genetic code supports the view that (A) all living organisms on Earth share a common ancestor (B) nucleic acids were the first living things (C) proteins are of secondary importance to living systems (D) the protein composition of all living organisms is the same (E) there is redundancy in the genetic code

A

A covalent bond occurs when... (A) one atom steals an electron from another (B) two atoms share an electron (C) one atom donates an electron to another (D) two atoms are attracted to each other (E) none of these are correct

B

Which of the following RNA sequences would bond to this DNA strand: AATAG? (A) AATAG (B) UUAUC (C) AAUAG (D) TTATG

B

What type of bond joins oxygen to hydrogen within a single water molecule? (A) hydrogen bond (B) ionic bond (C) polar covalent bond (D) nonpolar covalent bond (E) peptide bond

C

The smallest unit of matter that has the properties of a particular element is a/n ____________. (A) proton (B) neutron (C) electron (D) atom (E) none of these

D

A carbohydrate monomer is called a/n ______________. (A) monohydrate (B) carbosaccharide (C) polypeptide (D) amino acid (E) monosaccharide

E

Which of the properties of water allow life to exist in a lake when the temperature is below freezing? (A) Resists temperature change (B) Exists in all 3 states of matter (C) Universal solvent (D) Evaporative cooling (E) Solid is less dense than liquid

E