MMSC 490 Exams 2024 (Guaranteed Pass!)

cell wall correct answers -organelle of bacteria and plants -rigid layer composed of carbohydrates and proteins -porous and easily penetrated plasma membrane correct answers -organelle of bacteria, plant and animal cells -bilayer of phospholipids and associated proteins -provides separation f...

Aminoacyl-tRNA syntheses are enzymes that.... correct answers attach amino acids to specific transfer RNAs Which of the following statements about introns is true? correct answers Some types of organisms generally do not have introns The primary function of factor EF-G is to... correct answers...

What is the primary reason that mammalian red blood cells are used in the study of the plasma membrane? a. There are a lot of them and they are easily obtained. b. They contain larger plasma membranes than any other cell type. c. They are of particular interest because they are made up of a lip...

The eukaryotic cell cycle is composed of four phases in the following order: S; G1; G2; M G1; S; G2; M G1; G2; S; M G1; M; G2; S correct answers G1; S; G2; M The length of time it takes for the cells labeled during DNA synthesis to begin to enter mitosis is a good estimate of the length of ...

Which energy-producing process is thought to have come first during cellular evolution? correct answers Glycolysis The initial importance of a membrane enclosing self-replicating RNA molecules and associated proteins was that it correct answers maintained these molecules as a unit capable of repr...

Which of the following does not contribute to the large variety of antigen-binding specificities found among the immunoglobulins? correct answers retrotransposons In addition to synthesizing DNA, DNA polymerase I has a second catalytic activity; it can correct answers remove RNA primers How ma...

The pioneering studies of gene regulation in E. coli were conducted in the 1950s by... correct answers Jacob and Monod E. Coli preferentially utilizes glucose for energy. However, in the absence of glucose, genes that can metabolize alternative sugars are activated. Low glucose... correct answers...

Signaling by neurotransmitters is an example of _______ signaling. correct answers paracrine Peptide hormones and growth factors act on target cells by binding to cell surface and _______ receptors. correct answers soluble extracellular The effect of acetylcholine on the heart muscle cells is ...

The simplest eukaryotic genome is found in correct answers Saccharomyces cerevisiae Potential protein-coding regions of genomic DNA containing long stretches of nucleotide sequences that can encode polypeptides and contain no stop codons are called correct answers open-reading frames Analysis ...

A dominant negative mutant is typically one that... correct answers produces a protein that interferes with the function of the protein produced by the normal gene RNA molecules that serve as templates for protein synthesis are called _ RNAs correct answers messenger Transgenic mice are usuall...

During E. coli DNA replication, all newly synthesized or nascent DNA fragments must have one of the following characteristics a. a 5' hydroxyl and 3' triphosphate b. a 5' triphosphate and 3' monophosphate c. 5' monophosphate and 3' hydroxyl d. 5' triphosphate and 3' hydroxyl correct answ...

Which eukaryotic DNA polymerase replicates the lagging strand in the 3ʹ to 5ʹ direction? a. α b. γ c. δ d. None of the above; the lagging strand is replicated in the 5ʹ to 3ʹ direction. correct answers d. None of the above; the lagging strand is replicated in the 5ʹ to 3ʹ direction....

The plasma membrane barrier to passive diffusion is primarily a function of the membrane's a. phospholipids b. cholesterol c. proteins d. glycoprotein correct answers a mammalian erythrocytes (red blood cells) are particularly useful for studies of the plasma membrane because.. a. they have...

The length of time it takes for the cells labeled during DNA synthesis to begin to enter mitosis is a good estimate of the length of the _______ phase(s). a. G1 b. S c. G2 d. M correct answers c. G2 In a typical cycling mammalian cell, _______ of the cell cycle is spent in interphase. a. 99...