ATP is made up of the following except ribose base phosphate hexose This organel

Question

ATP is made up of the following except ribose base phosphate hexose This organelle is believed to be engulfed by a primitive bacteria mitochondria endoplasmic reticulum Golgi body lysosomes plasmids The carrier molecules used in active transport are calcium ions in the calcium pump. proteins. ATP molecules. carbohydrates. lipids. Which statement is true? humans are prokaryotes humans are eukaryotes human have nucleoid humans have plasmids humans are unicellular Penguins do not freeze in the arctic waters because this biomolecule triglycerides glycolipids chitin amylose fatty acid The building blocks of nucleic acids are amino acids. nucleotides. pentose sugars. phosphate groups. nitrogenous bases. In the bonding of nitrogenous bases, adenine is paired with cytosine. adenine is paired with guanine. cytosine is paired with thymine. guanine is paired with cytosine. The DNA molecule could be compared to a hair pin. ladder. key. globular mass. flat plate. Adenine and guanine are double-ringed purines. single-ringed purines. double-ringed pyrimidines. single-ringed pyrimidines. amino acids. In the comparison between a spiral staircase and a DNA molecule, the steps would correspond to sugars. hydrogen bonds. base pairs. nucleotides. phosphates. The appropriate adjective to describe DNA replication is nondisraptive. semiconservative. progressive. natural. lylic. DNA strands serve as which of the following during DNA synthesis? replicate substitute template source of nucleotides all of these

Explanation / Answer

25. Answer: d

The ATP molecule is composed of three components. At the centre is a sugar molecule, ribose , attached to one side of this is a base adenine. The other side of the sugar is attached to phosphate groups

26. Answer: a

According to the endosymbiotic theory the mitochondria were once primitive bacterial cells which were engulfed by primitive bacteria.

27. Answer:c

Active transport of molecules takes place at the expense of energy. ATP is high energy carrier molecule used in active transport

28. Answer: b

Humans are eukaryotes which are multicellular with a well defined nucleus. Presence of nucleiod and plasmids are prokaryotic features

29. Answer: e

The fluidity of cell membranes decreases with temperature. In response, organisms that are able to adapt to cold environments increase the ratio of unsaturated to saturated fatty acids thus retaining the required flexibility of membranes.

30. Answer: b

The building block of nucleic acids is called a nucleotide. A nucleotide is composed of three types of chemicals: bases, a phosphate group and a sugar with five carbon atoms.

31. Answer: d

Niitrogen bases are of two types: purines and pyrimidines. A purine always pairs with a pyrimidine. Adenine and Guanine are purines and Thymine and cytosine are pyrimidines. Adenine pairs with Thymine and guanine with cytosine.

32. Answer: b

DNA has the structure of a twisted ladder with nitrogen bases in the center of the ladder like the steps.

33. Answer: b

Adenine and guanine are purines. Purines are single ring compounds.

34. Answer: c

DNA has the structure of a twisted staircase with sugar and phosphate forming the rungs or backbone and the base pairs in the center like the steps.

35. Answer: b

DNA replication is semiconservative where in the newly formed DNA has one strand of the parent and one is newly synthesized.

36. Answer: c

DNA strand serves as template on which new strand is synthesized.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.