MMSC490 Exams (A GRADED) All combined

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 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 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 ...

The light microscope was used to observe the cellular structure of cork by ____, who named the chambers "cells". correct answers Hooke Which fish is proving to be a useful model organism for the study of vertebrate development? correct answers Zebrafish Arabidopsis thaliana is a model organi...

Interphase is defined as ______. correct answers the G1, G2, and S phases. The phase of the cell cycle that corresponds to the interval between mitosis and initiation of DNA replication is referred to as the ________. correct answers G1 phase. You perform an experiment by incubating a radiolab...

Which of the following statements regarding tRNAs is false? A) tRNAS are approximately 70-80 bases long and form a cloverleaf structure. B) All tRNAs have a CCA sequence at their 3′ terminus. C) tRNAs differ in sequence only at the anticodon. D) There are several modified bases present in matu...

Animal cells and most cells of higher plants are haploid. tetraploid. euploid. diploid. correct answers diploid Eggs and sperm are tetraploid. haploid. euploid. diploid correct answers haploid Our fundamental knowledge about mutation, genetic linkage, and the relationships between gene...

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 ...

Even though the complete genome is significantly smaller than humans, the flowering plant Arabidopsis thaliana has about _______ genes, about the same number as humans have. A) 26,000 B) 6,000 C) 100,000 D) 4,000 correct answers A) 26,000 Which of the following statements about introns is tru...

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 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...

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...

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...