Consider these statements about the structural features of nucleic acids. Some are true only for DNA or RNA, some are true for both, and some do not fit either. Which of the following statements is true for DNA only?

a. It contains the pyrimidine uracil.
b. It contains a 2 hydroxy group.
c. It contains the sugar 2-deoxyribose.
d. Bases are attached to sugars in an α-N-glycosidic linkage.

Which of the following statements is true for both DNA and RNA?

a. In base composition, %A = %C always.
b. Sugars are connected with a 3-5' phosphodiester link.
c. In base composition, %G = %C.
d. Both can be hydrolyzed in alkaline solution

Hannah is writing a report on how albedo affects the global climate. she’s proofreading her passage for any factual errors. which sentence must hannah correct before submitting her report? earth receives energy from the sun. this energy drives many of the processes on earth, including its climate. some part of this energy is reflected by earth’s surface. we use the term albedo to describe the reflected energy. albedo of an object is the ratio of the reflected radiation to the total radiation reaching the object. a value of 0 means no energy is absorbed by the object, whereas a value of 1 means that all of the energy is absorbed. in this way, the albedo of an object can influence earth’s atmospheric temperature.

To save time, you can approximate the initial mass of the solid to the nearest ±1 g. for example, if you are asked to add 14.3 g of copper, add between 13 g and 15 g. which of the following sets include two samples with an equal density? which all that apply below 15.4 g gold and 18.7 g silver 15.2 g copper and 50.0 g copper 20.2 g silver and 20.2 g copper 11.2 g gold and 14.9 g gold

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.