Which scientist(s) used density gradient centrifugation to demonstrate semiconservative replication?

  This is the relational schema in text version if you cannot see the graph. EMPLOYEE(Ssn, Fname, Minit, Lname, Bdate, Address, Sex, Salary, Super_Snn, Dno ) DEPARTMENT(DNumber, DName, Mgr_ssn, Mgr_start_date) DEPT_LOCATIONS(DNumber, DLocation) PROJECT(Pnumber, Pname, Plocation, Dnum) WORKS_ON(Essn, Pno, Hours) DEPENDENT(Essn, Dependent_name, Sex, Bdate, Relationship)

Cis-acting elements involved in transcriptional regulation are:  

The “GROUP BY” SQL clause is used to partition a relation into subsets of tuples?

Entity 1 Cardinality Ratio Entity 2 CLASS [cardinality] INSTRUCTOR

All EXCEPT which of the following are related to telomeres?

A Key can be a Super Key.

Entity 1  Cardinality Ratio  Entity 2 ITEM (that can be found  in an order)  [cardinality]  ORDER

Eukaryotic mRNAs are transcribed by RNA polymerase II, while RNA polymerase I and III transcribe rRNA, tRNA, and some snRNAs. Which of the following statements regarding regulation of the genes transcribed by RNA polymerase I, II, and III is false?

In order to determine the number of nucleotides in a codon, Crick and his colleagues studied frameshift mutations in the bacteriophage T4. Which of the following results supported the hypothesis of a triplet code?