Using Terms from the List Below, Fill in the Blanks

question 67

Essay

Using terms from the list below, fill in the blanks in the following brief description of the experiment with Streptococcus pneumoniae that identified which biological molecule carries heritable genetic information.Some terms may be used more than once.
$\begin{array}{lll}\text { carbohydrate } & \text { lipid } & \text { R-strain } \\\text { DNA } & \text { nonpathogenic } & \text { RNA } \\\text { identify } & \text { pathogenic } & \text { S-strain } \\\text { label } & \text { purify } & \text { transform }\end{array}$

Cell-free extracts from S-strain cells of S.pneumoniae were fractionated to __________ DNA, RNA, protein, and other cell components.Each fraction was then mixed with __________ cells of S.pneumoniae.Its ability to change these into cells with __________ properties resembling the __________ cells was tested by injecting the mixture into mice.Only the fraction containing __________ was able to __________ the __________ cells to __________ (or __________) cells that could kill mice.

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Definitions:

Maturity

The time at which payment to a bondholder is due from the issuer, according to the bond's terms.

Investment-Quality

A designation given to securities or investments considered to offer lower risk and stable returns.

Bond Ratings

A system used to evaluate the credit quality and risk level of a bond by assigning grades such as AAA, AA, etc.

Standard & Poor's

A US financial services company known for its stock market indices like the S&P 500, as well as providing credit ratings for borrowers.