Question 10 What is NOT true of the structure of RNA? It is sometimes single-stranded It is less stable than DNA Is has one more oxygen atom on its ribose sugar compared to DNA Is has one extra methyl group on its uracil base Its complementary strands are held together by hydrogen bonds

QUESTION 7 The covalent bond that joins glycerol and a fatty acid together (once dehydration synthesis has occurred) is called O a peptide bond O a phosphodiester linkage an ester bond a disulfide bridge QUESTION 8 Watch this video about proteins and then answer the questions that follow. What two functional groups are present in all amino acids? aldehyde hydroxyl amino carboxyl

Is 19 correct

QUESTION 5 In RNA, adenine pairs with bonds. with bonds and guanine pairs with with uracil, triple, thymine, double uracil, double, thymine, triple uracil, triple, cytosine, double O uracil, double, cytosine, triple

Question 11 Which of the following is the convention used to specify the sequence of bases in DNA? A start at the end closest to thymine B) start at the end closest to the first adenine (c) 3'-5' D) 5'-3'

Question 6 When light hits the special light-reactive molecular units inside rod cells, how do these units respond? They break in half and float into the eye's vitreous humor One bond shifts positions from cis to trans orientation they form a dehydration synthesis reaction with neighboring units, forming cross bridges O they open Na+ channels which rush into the cell Question 7 Which of the following about eyes is NOT RIGHT? O Spiders have image forming eyes O Sea Stars have eye spots O some compound eyes in arthropods have tiny lenses O cephalopods evolved eyes from early vertebrates

QUESTION 25 Phosphorylation, acetylation, methylation, and ubiquitylation are all ways to: Regulate carbohydrates using small molecules O Turn on and off the activity of proteins O Remove amino acids from proteins O Join proteins together

Question 14 If two proteins have the same sequence of amino acids, which type of protein structure must they have in common? O Primary structure O secondary structure O Quaternary structure O tertiary structure

QUESTION 12 All of the following statements are true about the nucleus EXCEPT Oa. It is surrounded by a nuclear envelope which is a single membrane. Ob. It contains the nucleolus where ribosomal subunits are made. Oc. The nuclear lamina maintains the shape of the nucleus. Od. In the nucleus, DNA combines with proteins to form chromatin. e. The nuclear envelop has pores and allows communication with the cytoplasm.

Question 3 The chemical combination of ribose and one of the five nitrogen bases and phosphate group results in formation of a O nucleoside. nucleotide. chromosome. O gene. DNA molecule.