Which of the following provides evidence in support of the R

Which of the following provides evidence in support of the RNA World hypothesis? RNA molecules are generally very labile and easily degraded. RNA molecules can fold into complex 3-D structures that can Interact with proteins. Some RNA molecules have enzymatic activity. Two of the above. All of the above Which of the following is NOT a key aspect of DNA structure? Antiparallel. 5\'rightarrow 3\' phosphodiester bond. Base-stacking interactions. 2\' attachment of hydroxyl group. 1\' attachment of purine or pyrimidine Which of the following is NOT an example of a weak Chemical bond or interaction that is important for molecular interactions? Hydrogen bond between water and a hydrogen covalently bonded to nitrogen in an amino acid sidechain. Charge interactions between carboxyl and amino groups of amino acid sidechains. Nonpolar amino acid sidechains packed closely together in the interior space of a protein structure. The condensation of amino and carboxyl groups to form a polypeptide. Base-stacking in double-stranded DNA. Which of the following accurately describes how a catalytic protein functions? The protein is perfectly complementary to the substrate. The protein maximizes interactions in the transition state and provides chemically reactive groups. The protein changes the free energy difference between product and substrate. The enzyme drives the reaction to completion, such that all substrate is converted to product.

Solution

1. E

RNA molecules are labile and can easily be degraded

They can fold into complex 3-D structures.

They show enzymatic Activity.

2. E

1\' attachment of purine or pyrimidine

3. C

non-polar amino acid side chains packed closely together in the interior space of a protein structure.

4. B

protein function is determined by functional part and the non- reactive part