Practice Questions

TLS Online TPP Program

#Question id: 4968

Which of these observations fails to support the endosymbiotic theory for the origin of eukaryotic cells?

#SCPH06 I Botany

the existence of structural and molecular differences between the plasma membranes of prokaryotes and the internal membranes of mitochondria and chloroplasts
the existence of size differences between the cytosolic ribosomes of eukaryotes and the ribosomes within mitochondria and chloroplasts
the existence of size differences between some prokaryotic cells and mitochondria
the existence of rRNA sequence differences between the cytosolic ribosomes of eukaryotes and the ribosomes within mitochondria and chloroplasts

More Questions

#Question id: 5692

#SCPH28 | Zoology

Aneuploids can be produced several ways except

#Question id: 3870

#SCPH05 I Biotechnology

“Footprinting” or DNase protection is a technique used to identify:

#Question id: 349

#SCPH01 Biochemistry

Increased atmospheric CO2 concentrations might have what effect on seawater?

#Question id: 483

#SCPH05 I Biotechnology

Glycogen is converted to monosaccharide units by:

#Question id: 73

#SCPH05 I Biotechnology

Match the Variation of Reaction Spontaneity (Sign of ΔG) given in Column I with the Signs of ΔH and ΔS given in column II.

COLUMN I	COLUMN II
	ΔH	ΔS	ΔG = ΔH – TΔS
1.	−	+	a. The reaction is both enthalpically and entropically opposed. It is nonspontaneous (endergonic) at all temperatures.
2.	−	−	b. The reaction is enthalpically opposed (endothermic) but entropically favored. It is spontaneous only at temperatures above T = ΔH/ΔS.
3.	+	+	c. The reaction is enthalpically favored but entropically opposed. It is spontaneous only at temperatures below T = ΔH/ΔS.
4.	+	−	d. The reaction is both enthalpically favored (exothermic) and entropically favored. It is spontaneous (exergonic) at all temperatures.