Cilia and flagella are distinguished from each other on the basis of
|A)||width and numbers|
|B)||length and numbers|
|C)||depth and numbers|
|D)||length and width|
The building blocks of DNA and RNA found in the nucleus of the cell are known as the
The "control center" of the cell is the
The structure of the nucleus can be described as
|A)||enclosed in a cell membrane|
|B)||enclosed in a nuclear envelope|
|C)||composed of cytoplasm|
|D)||composed of cytoplasmic organelles|
In the nucleus, DNA is wrapped within proteins. This structure is known as
One function of a nucleus in the cell is to
|C)||produce secretory vesicles|
|D)||control and coordinate cellular activities|
Elements present in DNA and RNA are
|A)||C, H, O|
|B)||C, H, O, N, S|
|C)||C, H, O, N, P|
|D)||O, H, N, P, S|
DNA is condensed to form a structure called a _________ in the nucleus.
|A)||are located in the cytoplasm|
|B)||produce ribosomal subunits|
|C)||have a distinct membrane|
|D)||are important for the formation of the Golgi apparatus|
Which of the following correctly matches a nuclear structure with its function?
|A)||chromosomes - contains RNA and histones|
|B)||nuclear envelope - contains the nucleolar organizer|
|C)||nuclear pores - allow molecules to move between the nucleus and cytoplasm|
|D)||chromatin - fluid portion of the nucleus|
Arrange the following in correct sequence:
- Polypeptide chains move through rough ER and then carried in vesicles to Golgi Apparatus.
- Vesicles are pinched off from Golgi Apparatus carrying newly formed proteins to plasma membrane.
- Golgi Apparatus separates and modifies varieties of proteins and then packages them into vesicles.
- Initiated by RNA, polypeptide chains are made by ribosomes on rough ER.
|A)||1, 2, 3, 4|
|B)||4, 1, 3, 2|
|C)||2, 3, 1, 4|
|D)||3, 2, 4, 1|
The transfer of information from DNA to messenger RNA (m-RNA) is known as
If an m-RNA molecule is 2400 nucleotides (bases) in length, this molecule will contain _______ codons.
Which of the following molecules contains the anticodon?
The process of DNA replication is
|A)||semiconservative in nature|
|B)||known as translation|
|C)||semipermeable in nature|
|D)||sequencing of codons in RNA|
DNA replication results in two new DNA molecules. Each of these new molecules has
|A)||two newly synthesized strands of nucleotides|
|B)||one strand of nucleotides from the parent DNA and one newly synthesized strand of nucleotides|
|C)||two strands of nucleotides from the parent|
|D)||two strands of nucleotides from the parent RNA|